The Metropolitan Police tonight offered an update on the incident near Teddington Cemetery.
In a statement they said: “Police were called at 2218hrs on Saturday, 16 December, to a report of a man assaulted in Church Road, Teddington.
“The 19-year-old man was taken to hospital suffering injuries to his arm. His condition is not life-threatening.
Officers from the Met’s South West BCU attended and following enquiries arrested three males on suspicion of GBH.
“All have been taken into police custody.
Any witnesses yet to speak with police are asked to call 101, ref 7336/16dec