US-led coalition warplanes carried out 30 air strikes on and around the de facto Isis capital in Syria on Friday night.
The strikes targeted positions in the city of Raqqa, in the north-east of the country, and the Division 17 airbase, which was seized by the militants from government troops, according to the Syrian Observatory for Human Rights based in the UK.
Sources in the city reported at least 30 strikes in all to the monitoring group. The Local Coordination Committees, a network of local groups in Syria, also confirmed the strikes.