South Sudan hospital patients 'shot in their beds'
20 January 2014 Last updated at 23:57 GMT
It is thought that up to 10,000 people have been killed in the South Sudanese conflict and a half a million displaced.
Over the weekend, troops loyal to the government recaptured the town of Bor from rebels led by the former Vice President, Riek Machar.
The conflict began as a political feud but has taken on ethnic overtones, pitting two tribes - Dinka and Nuer - against each other.
Mark Lowen has travelled to the town of Bor to witness the aftermath.