Barrel bomb attacks by Syrian regime helicopters killed at least 21 civilians late Thursday in a rebel-held town near Daraa city, a monitoring group said.
The Syrian Observatory for Human Rights said regime helicopters "dropped barrel bombs on neighbourhoods in Busra al-Sham in Daraa province," killing at least 21 people, including two children and four women.
Earlier the Britain-based group said 17 had been killed in the strikes.
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