Syrian regime and Russian bombardment has killed 20 civilians including seven children in northwestern Syria, a war monitor said Saturday, in the latest deadly raids on the embattled opposition bastion. Regime warplanes and helicopters late Friday carried out air strikes on Mahambel village in Idlib province, killing 13 civilians including the seven children, the Syrian Observatory for Human Rights said. Another seven civilians were killed Saturday, including a woman hit by regime rocket fire on the outskirts of the town of Khan Sheikhun in the south of the province, the Britain-based war monitor said.