Coalition raids kill 29 civilians in Raqa

US-led coalition raids on Raqa in northern Syria have killed 29 civilians over the past 24 hours as American-backed forces battle the Islamic State group, a monitor said Tuesday.

The Britain-based Syrian Observatory for Human Rights said nine women and 14 children had been killed in coalition air raids on Raqa city since Monday evening.

It said 14 of the dead were members of one family.

The toll could rise because of the number of critically wounded, it added.

The American-led coalition battling IS in Syria and Iraq on Tuesday entered its fourth year of operations.

It began on August 8, 2014 in Iraq, moving later to battle the jihadists in neighbouring Syria.

The United States is backing an Arab-Kurdish alliance that is fighting to oust IS from Raqa, its main Syrian stronghold, and the province of the same name.

The Observatory, which relies on a network of sources inside Syria for its information, has regularly reported civilians killed by coalition strikes.

It says it determines what aircraft carried out raids according to their type, location, flight patterns and the munitions involved.

The United States has admitted that its strikes caused the deaths of 624 civilians since 2014. Rights organisations say the number is far higher.