The head of a volunteer group in Syria has described the dire situation for residents of Aleppo. He said the besieged city has been frequently hit by banned weapons. 

"There is nowhere that Syrian civilians can hide or take cover in the city of Aleppo. They are all just basically sitting in their homes waiting to be killed and there are no solutions for these people," said Raed Al-Saleh, head of Syrian Civil Defence.

"So in the past eight days we have witnessed a ferocious campaign against Aleppo. We've documented 1700 air strikes. Nineteen of those have been attacks using bunker busters. And 200 of them have been cluster bomb attacks and weapons that are banned internationally."