Ukraine's president on Monday threatened military action after pro-Russian separatists occupying government buildings in the east ignored an ultimatum to leave and another group of rebels attacked a police headquarters in the troubled region. Acting president Oleksander Turchinov also held out the possibility of a referendum on the future shape of the Ukrainian state, partly addressing demands made in the largely Russian-speaking east for more control over their local affairs. As the 9 a.m. (0600 GMT) deadline issued by authorities in Kiev expired, a Reuters reporter in the flashpoint city of Slaviansk, where armed men had seized two government buildings, saw nothing to show the rebels were obeying the ultimatum. At least 100 pro-Russian separatists attacked the police headquarters in the city of Horlivka on Monday, a witness told Reuters, and video footage on Ukrainian television showed an ambulance treating people apparently injured in the attack. In all, separatists have seized government buildings and security facilities in 10 cities.
