The United Nations says 50 civilians including children have been killed in a series of air strikes in Syria.

The bombing raids hit at least five medical facilities and two schools in the northern cities of Aleppo and Idlib.

UN Secretary General Ban Ki-Moon says the attacks are "blatant violations of international law".

President Assad's regime says US-led coalition forces were responsible.

However, Doctor Mego Terzian from Médecins Sans Frontières is blaming Russian or Syrian government forces: