Barrel bomb attacks in Syria's Aleppo kill 25 -monitoring group

Firefighters work to extinguish fire at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's district of al-Sukari June 16, 2014. REUTERS/Hosam Katan

BEIRUT (Reuters) - At least 25 people were killed in barrel bomb attacks in Syria's northern city of Aleppo on Monday, a monitoring group said.

Barrel bomb attacks are strikes in which helicopters drop highly destructive improvised explosives. Western powers have condemned their use as a war crime, but they continue to be used almost every day in Aleppo and other parts of Syria.