Suspected Russian air strikes have killed 32 civilians, half of them women and children, in three areas in northern Syria, the Syrian Observatory for Human Rights said on Friday. 

Observatory head Rami Abdel Rahman said the warplanes bombarded Raqa, the Islamic State group's de facto Syrian capital, as well as the towns of Azaz and Al-Bab in Aleppo province, on Thursday. 

Six children and 11 women were among the dead, and dozens of people were wounded, the Britain-based monitor said.