A man's ear was bitten when a train row erupted over a person's loud mobile phone conversation, police say.

The 24-year-old victim was bitten after another passenger complained about his friend "speaking loudly on his phone" on the London commuter route late on Friday 6 October, according to the Daily Telegraph UK.

"A verbal altercation ensued, during which the passenger leaned over and bit the victim's ear," British Transport Police (BTP) said.

Police want to speak to this man in connection with the incident. Photo / British Transport Police
Police want to speak to this man in connection with the incident. Photo / British Transport Police

"When the offender eventually stopped biting the victim's ear, he went and sat back down in his seat.

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"The victim and his friend left the train at Peckham Rye."

He sustained a deep cut to his ear and required hospital treatment following the incident on the 11.40pm Southern Trains service between London Bridge and Peckham Rye.

Police say no arrests have been made and have released a CCTV image of a man they believe may have information which could help the investigation.

"We'd like to speak to him in connection with an assault against a 24-year-old man whose ear was bitten," BTP said.