By | December 31 2012 2:51 PM

It may not have been with gas or mustard gas, but between 150 and 180 people were massacred outside Homs, Syria, over the weekend by government forces in the single bloodiest day in the civil war to date, the Washington Post reported on Sunday. The total death toll for the weekend stood at 400, including 23 children, according to the U.K.-based Syrian Observatory for Human Rights.