A separatist leader says rebels have recovered the black boxes for the downed Malaysia Airlines Flight MH17.

Alexander Borodai said the devices would be handed over to the International Civil Aviation Organization.

He also said the bodies recovered from the crash site in eastern Ukraine would remain in refrigerated containers at a train station in the town of Torez until the arrival of an international aviation delegation.

The plane was shot down Thursday over disputed territory, killing 298 passengers and crew.