Footage from inside a hospital in a rebel-held part of the Syrian city Aleppo shows the risky conditions doctors must work in.

Despite a partial ceasefire bringing relative calm after years of war, fighting is continuing in parts of Aleppo between government forces and rebels.

Dr Zahed Katurji explains why he and his team must operate underground and in constant fear.

Video produced by Mohamed Madi and Cordelia Hemming