US-led air strikes on Syria have killed more than 500 people, mainly Islamist militants, since they began last month, activists said as fighting continued in the border town of Kobani.
The Britain-based Syrian Observatory for Human Rights, which relies on a network of activists on the ground, said 553 people had been killed since the air strikes began on 23 September, including 32 civilians. The civilians included six children and five women.
The group said it has documented the deaths of 464 Islamic State (Isis) fighters, adding that the real number could be much higher. Another 57 fighters with the al-Nusra Front, which has links to al-Qaida, were killed in air strikes on the northern Syrian province of Aleppo and Idlib, the Observatory said.