Amnesty International has accused the US-led coalition of endangering lives of civilians during its attacks against Islamic State in the Syrian city of Raqqa last year.

In a report, the human rights group said during its campaign to recapture the Islamic State headquarters in Syria, the coalition did not take enough account of civilians or take the precautions necessary to minimize harm to them.

The campaign to capture Raqqa was waged from June to October last year by the Syrian Democratic Forces, an alliance of Kurdish and Arab militias backed by coalition warplanes and special forces troops.