Russian troops have stormed a Ukrainian airbase in Crimea throwing stun grenades and firing automatic weapons in the air.
Reports say at least one person was injured during the assault on Belbek base, near Sevastopol. The base is now said to be under Russian control.
Earlier, several hundred unarmed protesters seized a Ukrainian naval base at Novofedorivka, western Crimea.
Russia formally annexed the Ukrainian region on Friday.
Russian forces appear to be stepping up their efforts to push all Ukrainian forces out of the region.
In another development, Ukraine’s warship Slavutych has been seized.
The command vessel was seized by Crimean “self-defence” units and Russian troops after a two-hour assault in Sevastopol, a Ukrainian defence spokesman said.
The BBC’s Ian Pannell in Belbek says the Ukrainian troops on the peninsula feel beleaguered and abandoned by their commanders.
