Another prisoner cut his head by banging his head on a cell door in what the military officials said was a self-inflicted wound.

WSJ: US military defends Guantanamo prison raid

Dr Lorenz Studer, head of the Stem Cell and Tumor Biology Laboratory at the centre, and the lead researcher on the study, told BBC News Online that the study was "proof of principle" that cloned embryonic stem cells could be reliably transformed into a variety of useful cell types.

BBC: NEWS | Health | Mouse cloned to cure Parkinson's

Thomas Orchard, 32, was arrested in Exeter in October, but died in hospital after being found "unresponsive" with head injuries in a custody cell.

BBC: Officer could face charges over Thomas Orchard death