Two men are being questioned by police after a teenager was stabbed to death and two others injured in a knife attack in a flat in south-east London.
Local residents say the area has been blighted by crime
Police were called to Waterhead Close, Erith, in the early hours of Saturday and found the boys, aged in their mid to late teens, suffering stab injuries.
A murder inquiry was launched after one of the teenage victims was pronounced dead at the flat in Verona House.
One youth remains seriously ill in hospital, the other was discharged.
A police spokesman said: "Two males, both aged in their twenties, have been arrested in connection with the murder of a male at Verona House, Erith.
"Both men are in custody at a south London police station."
Officers said the victims may have been involved in an "altercation" with a suspect or suspects who left the flat after the attack.
Officers believe the teenager was stabbed following a row
Forensic teams were combing the flat on the 15-storey tower block, one of seven on the Larner Road Estate.
On Saturday local councillor David Hurt, from Bexley Council, said the estate had a reputation for crime that was unjustified.
However, local residents said the building was condemned and the area was known for being a "low-life area".
The youth is the second London teenager to die of stab wounds this year.
On New Year's Day, 17-year-old Henry Bolombi was chased by a group of youths and then stabbed in the chest in Edmonton, north London.
Last year 26 teenagers were killed in stabbings and shootings in London.