Coalition air strikes 'killed thousands of civilians'

DAMASCUS - The US-led coalition airstrikes against the Islamic State group in Syria have killed thousands of civilians since they entered the course of the Syrian war four years ago, a war monitor reported on Sunday.

The Syrian Observatory for Human Rights, a UK-based monitoring group, said those Syria strikes had since killed 3,331 civilians, and the death toll is part of a total of 12,000 rebels and ultra-radical militants killed by the US-led strikes.

The monitor relies on a network of sources inside Syria and tracks flight patterns, aircraft involved and ammunition used to determine who carries out raids.