DETECTIVES are appealing for witnesses after three men and a teenage boy were left with knife wounds following an argument on a train.

Police were called to Woolwich Arsenal train station at 11.10pm on May 28 to reports of a disturbance between four people on the 10.39pm Charing Cross to Gillingham Southeastern service.

All four received various non life-threatening knife wounds.

They were taken to hospital. Three were released the same day and one left hospital the next day.

Officers searched the train and recovered a carpet knife from one of the carriages.

Two men aged 18 and a 17-year-old boy, all from Abbey Wood, were arrested and released on bail until July 8.

A 29-year-old man from Medway in Kent was also arrested in connection with the incident and released on bail until the same date.

Investigating officer, Detective Constable Vanessa Cottington, said: “We know from our inquiries so far this would have been a busy train and a number of people on board may have witnessed this incident.

“If you saw anything we need you to contact us.”

Anyone with any information should call 0800 405040 quoting incident 705 of 28/05/10 or Crimestoppers on 0800 555 111.