A 18-year-old man has been stabbed to death at a flat in Greenwich town centre, police said.
The teenager was knifed on Saturday night at an apartment in the south London town.
Police and paramedics raced to the flat in Topham House, Prior Street, at 10.40pm.
Medics fought to save the victim but he was pronounced dead at the scene.
Scotland Yard said a 17-year-old boy has been arrested in connection with the attack and remains at a south London police station.
A Met Police spokesman said: "His [the victim's] next of kin have been informed. A post-mortem examination will be held in due course. Formal identification awaits. "
A crime scene remained in place on Sunday morning and murder detectives are investigating with police from Greenwich.
Police are appealing for witnesses and those with information about this attack to contact police them 101 quoting CAD 7621/8Dec or calling Crimestoppers anonymously on 0800 555 111.
