At least seven people were killed and 20 injured in an attack on a hospital and market in South Sudan on Saturday, a medical charity has said, as worries mount that the country could return to all out civil war.

The Medecins Sans Frontieres hospital is ‘the only one in Fangak county, serving over 110,000 people who already had extremely limited access to healthcare’.

At least seven people were killed and 20 injured and the last remaining hospital and pharmacy in the country's Fangak county were destroyed in bombings, medical charity Medecins Sans Frontieres said on Saturday.