Warning this article contains images that some may find distressing
European observers from the Organization for Security and Co-operation in Europe (OSCE) verified that the train stationed in Torez, a town 15 km (9 miles) from the scene of the Malaysian airliner crash in eastern Ukraine, contained bags with frozen bodies.
The monitors were accompanied by armed rebels and were not let inside the carriages, but took photographs of the dozens of bags inside.
The observer said he did not know where the bodies were being taken next or whether there were more to come.
A railway worker told Reuters earlier that the bodies would be sent south-west to an undisclosed location.
After lying there for two days in the summer heat, by Sunday the bodies had been removed from a large swathe of the crash site, leaving only bloodstained military stretchers along the side of the road.