KIEV (Reuters) - Ukraine's acting president called an emergency meeting of Kiev's national security council on Saturday after pro-Russian separatists seized control of government buildings in the eastern city of Slaviansk.

"At 9 p.m. (1800 GMT) a meeting will take place of the Ukrainian council of security and defense because of the situation in the east of Ukraine," a spokeswoman for Acting President Oleksander Turchinov said.

(Reporting by Conor Humphries; Editing by Kevin Liffey)