People dig in the rubble in an ongoing search for survivors at a site hit previously by an airstrike in the rebel-held Tariq al-Bab neighborhood of Aleppo, Syria. (Reuters Photo)

DAMASCUS, Sept. 24 (Xinhua) -- A total of 2,617 civilians have been killed in the U.S.-led anti-terror operations in Syria since late 2014, a monitor group reported Saturday.

The death toll includes 615 children and 443 women, said the London-based Syrian Observatory for Human Rights.

The casualties were documented in the provinces of Hasakah, Raqqa, Aleppo, Idlib and Deir al-Zour, the group added.

The U.S.-led coalition has been backing the Kurdish-led fighters in northern Syria in their fight against Islamic State militants.

The Syrian government has repeatedly slammed the coalition's intervention in Syria as illegitimate, and urged the UN to dissolve the coalition, citing the civilian casualties.