Pro-Russian separatist leader, Vyacheslav Ponomaryov, has confirmed that Western observers have been freed in the eastern Ukrainian town of Slaviansk and that there were no conditions for their release.
He said: "As I promised them, we celebrated my birthday yesterday and they left. As I said, they were my guests."
He confirmed that 12 people had been released, including Ukrainians and Europeans.
More top news
The government is encouraging motorists to think twice about buying diesel cars in a bid to improve air quality.
Atlantic frontal systems spread rain in from the northwest on both weekend days. Windy - with gales across the north and west but mild.
The band announced at a free concert on Friday that they would take over the event's Pyramid stage on Saturday June 25.