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.
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Travel industry chiefs have called for universal safety standards to be introduced across Europe, to help prevent future tragedies.
The tragic deaths of two children on a Thomas Cook Corfu holiday in 2006 could lead to a crisis of confidence for the travel industry.
Sunny spells for tomorrow, although the further we go into the weekend then we will see outbreaks of rain moving south eastwards