Updated

Ukrainian national guardsmen have opened fire on a crowd outside a town hall in eastern Ukraine and an official for the region's insurgents says there are fatalities.

Sunday's bloodshed in the town of Krasnoarmeisk occurred hours after dozens of guardsmen shut down voting in a referendum on sovereignty for the region.

An Associated Press photographer who witnessed the shooting said two people were seen lying unmoving on the ground and insurgent leader Denis Pushilin was quoted by the ITAR-Tass news agency as saying there were an unspecified number of deaths.