The US says it was the most serious fighting in eastern Ukraine so far this year.Read more
Pavel Sheremet's friends say they are making more progress investigating his murder than the police.
Find out what led Ukrainian crane operator Dmitriy Balandin to design a low-cost walking aid.
The BBC's Fergal Keane has been to see whether the ceasefire is working in Ukraine.
More than 3,000 military personnel are taking part in a military exercise on the Black Sea.
An Oldham man who fought with anti-government forces in Ukraine has been jailed for a terrorism offence.
Benjamin Stimson, 41, was admitted a charge under the Terrorism Act 2006 at Manchester Crown Court.
Stimson travelled out to Ukraine in 2015 to join pro-Russian rebels.
The court heard he was arrested when he arrived back at Manchester Airport and said: "I think I need a lawyer."
He was jailed for five years and four months.