Updated

Pro-Russian gunmen have seized yet another administrative building in eastern Ukraine, further raising tensions in Ukraine's Russian-leaning regions shaken by separatist unrest.

Insurgents wielding automatic weapons took control of the city council building Wednesday morning in the city of Horlivka in the Donetsk region which borders Russia, adding to the police building which they had controlled for several weeks.

An Associated Press reporter saw a small group of men standing guard outside the building and checking the documents of those entering. One of the men said that foreign reporters will not be allowed in and threatened to arrest those don't obey orders.

The insurgents now control buildings in about a dozen cities in eastern Ukraine, demanding greater ties or outright annexation by Russia.