Syrian forces kill 83 in barrel bomb attacks in Aleppo - activists

Smoke rises while Free Syrian Army fighters stand at the Karm al-Tarab neighborhood frontline in Aleppo February 1, 2014. REUTERS/Ammar Abdullah

BEIRUT (Reuters) - Syrian military helicopters dropped more improvised "barrel bombs" on the northern city of Aleppo on Sunday, a monitoring group said, bringing the death toll to at least 83 people in the latest episode of a campaign that many consider a war crime.

Most of the victims killed since Friday have been civilians from the city's eastern districts, including women and children, according to the British-based Syrian Observatory for Human Rights, which has a broad network of sources across Syria.