The building of the Security Service of Ukraine (SBU) in Kramatorsk has not been seized, SBU spokeswoman Maryna Ostapenko said.

"As far as I know, there was no seizure there," she said at a briefing in Kyiv on Tuesday.

"To say that it has been seized is an overstatement. People there walk in and out. It is a small building," Ostapenko said.

Several media outlets said earlier that separatists seized the town police and local SBU buildings in Kramatorsk.