Key points
- British tanks used inside Russia by Ukrainian troops, Sky News understands
- Thousands more being evacuated from Kursk
- Russian detainees in Ukraine reveal Kursk reality
- Michael Clarke analysis:How long can Ukraine hold Kursk?
- Ballerina jailed in Russia for charity donation supporting Ukraine
- Listen to the Daily above and tap here to follow wherever you get your podcasts
- Reporting by Mark Wyatt
Ukraine says it has set up a military office in occupied Kursk region
Ukraine's top commander says Kyiv has set up a military commandant's office in the occupied Kursk region of Russia.
Oleksandr Syrskyi also says Ukrainian forces have seized control of 82 settlements and taken up to 1.5km (0.93 miles) of territory in the region in the last 24 hours - and are still advancing.
Mr Syrskyi told Volodymyr Zelenskyy in a video published by the Ukrainian leader that Kyiv's forces had advanced 35km (21.7 miles) into the Kursk region since launching its attack last week.
Russia taking steps to protect Belgorod, says minister
The Russian defence ministry says it is bringing in measures to protect its Belgorod border region from Ukrainian attack.
A state of emergency had already been declared in the area, which sits directly next to the Kursk region that was invaded by Ukraine 10 days ago.
Russian defence minister Andre Belousov said measures were being taken to "increase the efficiency" of troop command and increase interaction with regional law enforcement.
"The fact that (Russia) are thinking in those terms shows that they are actually taking this more seriously than they say they are when they address the world's media," military analyst Professor Michael Clarke told Sky News.
Navalny's wife rejects finding he died from multiple diseases
The wife of late Russian dissident Alexei Navalny has rejected the findings of the investigation into his death that said he died of a combination of diseases.
Yulia Navalnaya says she will demand a criminal investigation into her husband's death, and that her team will continue to conduct its own investigation.
Navalny died suddenly in February whilst being held in a maximum security prison in the rural settlement of Kharp, 2,046 kilometres (1,271 miles) east of Moscow.
A medical death certificate shown to Navalny's mother claimed that the causes of her son's death were "natural".
Ballerina jailed for 12 years in Russia after donating £40 to charity
A woman has been jailed in Russia for 12 years after she gave £40 to a charity supporting Ukraine.
US-Russian citizen Ksenia Karelinawas accused of treason when she was arrestedin Yekaterinburg, in southwestern Russia, in February.
Investigators searched her mobile phone and found that she made a $51.80 (£40) donation to Razom, a charity that provides aid to Ukraine, on the first day of Russia's invasion.
The 33-year-old admitted the charge at a closed trial in the city earlier this month, according to Russian news agencies.
On Thursday, Karelina appeared in court in a white sweatshirt and blue jeans, sitting calmly in a glass courtroom cage, before she received her sentence.
In pictures: Ukraine continues fight away from Kursk
Away from Ukraine's invasion into the Russian region of Kursk, there are still fierce battles being fought along the frontline.
In the east of the country, Ukrainian soldiers are fighting near the town of Chasiv Yar, which has faced a rapid Russian advance in recent weeks.
The heavily-fortified town sits west of the ruined Russian-occupied city of Bakhmut.
The images below show a Ukrainian soldier firing a 120mm mortar towards the Russian frontline.
Ukraine denies involvement in Nord Stream damage
An advisor to Volodymyr Zelenskyy has denied Ukraine's involvement in explosions which damaged the Nord Stream 2 gas pipeline.
The multi-billion dollar Nord Stream 1 and 2 pipelines transporting gas under the Baltic Sea were ruptured by a series of explosions in September 2022.
The blasts drastically reduced Russia's ability to use its energy exports as leverage over Europe, with the damaged pipeline previously carrying 40% of Moscow's gas exports to the continent.
"Such an act can only be carried out with extensivetechnical and financial resources ... and who possessed all thisat the time of the bombing? Only Russia," Mykhailo Podolyak said.
Polish prosecutors said on Wednesday that Poland hadreceived a European arrest warrant issued by Berlin inconnection with the attack, but the suspect, a Ukrainian mannamed as Volodymyr Z, had already left Poland.
Where is Ukraine's attack into Russia taking place?
It's been 10 days since Ukraine launched its surprise attack on Russia, with troops crossing the border into the Kursk region.
It represents the first major offensive on Russian soil since Moscow launched its full-scale invasion of Ukraine in February 2022.
As the maps below show, Ukraine entered Russia from the Sumy region, in the northeast of the country.
Thousands of Russian civilians have been evacuated since then, while Ukraine has captured Russian troops,who have told Sky News that the attack on 6 August took them by complete surprise.
Earlier this week, Ukraine's top military commander said his troops were in control of 1,000 square kilometres (386 sq miles) of territory.
British tanks have been used inside Russia by Ukrainian troops
ByDeborah Haynes, security and defence editor
Ukrainian troops have used British Challenger 2 tanks in their offensive inside Russia, Sky News understands.
It is believed to be the first time British tanks - operated by Ukrainian soldiers - have been used in combat on Russian territory.
The Ministry of Defence in London declined to comment on operational detail. Ukraine's armed forces did not offer a comment.
However, the UK has confirmed that Ukraine is free to use British weapons on Russian territory, according to government policy.
A source said this included Challenger 2 tanks and signalled that they had been used during the Ukrainian incursion, which began on 6 August.
Details on how and when Ukrainian forces potentially deployed Challenger 2 tanks within the Russian region of Kursk were not immediately clear. Neither was the number of tanks that may have been involved.
But Ukraine's powerful 82nd Air Assault Brigade is the unit of the Ukrainian armed forces that has been operating the British main battle tanks since last year.
Elements of the brigade are confirmed to be taking part in the Kursk offensive.
The UK agreed to give Ukraine 14 of its Challenger 2 tanks in January 2023 in a move that prompted Germany and the United States to follow suit with their versions.
One of the British tanks was destroyed on operations inside Ukraine last September – the first time the Challenger 2 had been taken out in active combat.
In service since 1994, the Challenger 2 tank weighs 62.5 tonnes and is armed with a 120mm rifled gun and a 7.62mm chain gun.
Under UK government policy, the use of any weapons given to Ukraine by the UK must be in line with international law. The military assistance is aimed at helping the Ukrainian military defend itself from Russian attack.
The Times reported on Wednesday that Sir Ben Wallace, the former defence secretary, had disclosed how during his tenure he gave permission for Ukraine to hit targets inside Russia using "whatever weapons [were] supplied to it", with the exception of long-range Storm Shadow cruise missiles.
He suggested the same rules applied to Ukraine's Kursk operation in Russia.
Sir Ben was quoted as saying that if the attack was designed to go after logistics and infrastructure supporting Russia's invasion of Ukraine it was "perfectly legitimate" for Ukraine to use British weapons.
A Ministry of Defence spokesperson said: "There has been no change in UK government policy, under Article 51 of the UN Charter Ukraine has a clear right of self-defence against Russia's illegal attacks, that does not preclude operations inside Russia.
"We make clear during the gifting process that equipment is to be used in line with international law."
Russian detainees in Ukraine reveal Kursk reality
By Deborah Haynes, security and defence editor, in Ukraine
The Russian prisoners of war - mostly young conscripts - were grouped together in a line of cells along a dimly lit corridor at a detention site in Ukraine.
They had been captured during a shock advance by Ukrainian troops into Russia's Kursk region.
Sky News is not showing the detainees in compliance with international law.
But we did talk to some of them - including conscripts, aged between 19 and 21.
Read what they said here...
Ukrainian MP: Kursk invasion sends 'very clear' message to NATO
A Ukrainian MP has told Sky News that her country's invasion into Russia's Kursk region should send a "very clear message" to NATO members that Ukraine needs long-range weaponry.
Maria Mezentseva says Ukraine wants the ability to use such weapons to strike air bases and missile launch sites deep into Russian territory.
If it had this, Ms Mezentseva says, Ukraine would not have been "forced" into creating a "buffer zone" inside Russia.
Asked by Sky News what the invasion into the Kursk region had done for Ukraine, she said: "In the Kharkiv region, it became more peaceful.
"And it keeps the morale going that Russia's army is not the second-bravest, largest, and most advanced in the world.
"This also sends a very clear message to all our allies in NATO, all our Western allies in the G7, that we really need long-range weaponry so that we would not be forced to create this buffer zone."
The UK's Ministry of Defence signalled last night that Ukraine was free to use weapons gifted by the UK as they continue their advances into Russia.
It said there was "no change in UK government policy" and that Ukraine has a "clear right" to use weapons for its self-defence.
