A fight broke out among inmates of Tihar jail over allocation of a room, leaving 10 prisoners injured, police said.
According to the police, two groups of prisoners quarrelled over allocation of a particular room, which soon turned into fisticuffs.
"The two groups had a heated argument and then bashed each other badly. Of the 10 injured, five are critically wounded and undergoing treatment at the hospital," said a police official.
The police are investigating the matter.