(CNN) -- The tiny corpses, faces pale and grimy, lay side by side, wrapped in a red blanket. They are the latest child casualties in the bloody Syrian civil war. They are also grisly evidence of the carnage in the besieged Syrian city of Daraya over the weekend. Published Monday by the opposition outlet Shaam News Network, the image underscores the horrors in Daraya. At least 245 people were found dead in the Damascus suburb over the weekend, opposition activists say. Mass killings have been reported regularly across Syria during the nearly 18-month-long crisis. Like the others, this incident sparked international outrage.
@highlight
At least 231 people are reported killed across Syria on Monday
@highlight
France warns against use of chemical weapons
@highlight
The United Nations, France condemn Daraya killings
@highlight
A transition report is to be released Tuesday
Government forces and their allies have been fighting rebels for control of @placeholder's largest city.