A Russian aviation official says a draft Dutch report into last year's crash of Malaysian Airlines flight 17 in eastern Ukraine "raises more questions than it gives answers."

The Dutch Safety Board has made the draft available to representatives of Malaysia, Ukraine, the U.S., Russia, Britain, Australia and the Netherlands.

Oleg Storchevoi, a deputy chief of Rosaviatsiya, said Thursday the agency has complaints regarding both the technical data and the arguments in the report, according to Russian news agencies. He did not give details.

Controversy continues over who downed the plane last July over eastern Ukraine, killing all 298 people aboard. Ukraine and the West suspect it was destroyed by a Russian surface-to-air missile fired by Russian soldiers or Russia-backed separatist rebels fighting in the area. Russia denies that.