Other soldiers stood guard around the perimeter to make sure that no one escaped. After some had been killed, others jumped into the trenches among the dead, however the soldiers went through and shot them. Evidence collected upon exhumation determined that some were suffocated to death.[5][6] There were massacres on 5 November, 20 November (282 victims), 12 and 19 December, 5 and 20 January, and 19 February.[7]