Two Sri Lankan refugees came to blows over illegal dealings in ganja and lottery tickets and were admitted to a hospital from where one of them gave police the slip.
The incident happened on Sunday night.
The two, staying at the Boluvampatti camp near here, had a fight over their illegal trade and got injured, police said.
The two were taken to the hospital by the police, from where one of them, said to be a history-sheeter, escaped while being taken to the x-ray room, they said.
A special team has been formed to catch the accused, the police added.