A Ukrainian court has released a potentially key witness to the downing of Malaysian Airlines Flight MH17 five years ago.
Volodymyr Tsemakh was seized earlier this year from a separatist-held part of Ukraine.
He is reported to have played a key role in the rebels' air defences.
On 17 July 2014, the jet was travelling from Amsterdam to Kuala Lumpur when it was was hit by a missile over eastern Ukraine. All 298 people on board died.
The downing of the aircraft came amid intense fighting between Ukrainian troops and Russian-backed rebels in eastern Ukraine. Some 13,000 people have died in the conflict over the last five years.
A team of international criminal investigators said in 2016 that the missile had been fired from a field controlled by Russian-backed separatists.
What are the circumstances of Mr Tsemakh's release?
The suspect was charged with terrorism offences following his reported seizure by Ukrainian special forces from rebel-held territory in June. He is reported to have been in detention in Kiev since 28 June.
He was released from custody but the court said his movements would continue to be restricted pending his trial in October.
However, he has not been electronically tagged, and the BBC's Jonah Fisher in Kiev says nobody is expecting him to show up in court.
Unconfirmed reports suggest Mr Tsemakh is on a list of prisoners that Moscow wants exchanged with Ukrainians it holds, including 24 sailors captured off Crimea in November.
Ukraine and Russia are currently negotiating the swap and it has been widely reported that Mr Tsemakh's fate has become a stumbling block.
Meanwhile Russian President Vladimir Putin, speaking at around the time of Mr Tsemakh's release, said that the talks were being finalised and the swap could involve a large number of people. He added that the date of the exchange would soon be announced.
Why is he sought as a witness?
The Dutch-led Joint Investigation Team (JIT) concluded in May 2018 that the missile system involved belonged to the 53rd Anti-Aircraft Missile brigade, based in the western Russian city of Kursk. It produced evidence that it said proved how the missile system had reached eastern Ukraine.
Russia has denied any involvement in the incident.
Arrest warrants have been issued for four men – three Russians and a Ukrainian – on suspicion of murder in connection with the tragedy.
Mr Tsemakh is not among the suspects but is a "person of interest" in the investigation.
One of the suspects, Igor Girkin, has said he was head of the separatists' air defences in Snizhne, close to where the JIT says the missile was fired from.
International prosecutors have said they would like Mr Tsemakh to remain in Ukraine so they can ask him further questions.
Last week, Dutch prosecutors urged thRead More – Source