The refrigerated train carrying the bodies of those killed in the Ukraine plane disaster suffered a power outage last night.
International indignation over the incident has grown as investigators still only have limited access to the crash site and the bodies have not been released yet.
A train engineer told The Associated Press the refrigeration had been off overnight but it was not immediately clear why.
The cooling system was back up and running early on Monday, the engineer said.
Thousands of online users have taken to social media to call for the victims of the Malaysian airliner crash to be returned to loved ones.
United States intelligence officials admitted that they do not know who fired the surface-to-air missile that downed flight MH17.
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