BEIRUT - The death toll from an air strike by US-led forces on the northern Syrian province of Aleppo on Friday has risen to 52 including seven children, a group monitoring the conflict said on Saturday.

The British-based Observatory for Human Rights said the air raid on Friday had mistakenly struck civilians in a village on the eastern banks of the Euphrates River in Aleppo, killing members of at least six families.

The group said at least 13 people remain missing.