At least 37 children have been killed in government air strikes and shelling across Syria in the last 36 hours, the Syrian Observatory for Human Rights monitoring group said Sunday. The Britain-based Observatory said 20 children had been killed between midnight on Saturday and Sunday after**on, with 17 more killed between Friday and Saturday night. The deaths came in regime shelling and air strikes across the country, though most took place in the **rthern province of Aleppo and **rthwestern Idlib, Observatory director Rami Abdul Rahman said.