Paramedics from the London Air Ambulance attended the scene, but the teenager could not be saved.
A teenager has been stabbed to death in southeast London.
The 18-year-old suffered stab wounds during an incident at a home in Greenwich and he died at the scene, the Metropolitan Police said.
A 17-year-old boy has been arrested in connection with the incident.
Officers were called to Topham House in Prior Street at 9.41pm on Saturday after receiving reports of a man who was unresponsive after being stabbed.
Paramedics from the London Air Ambulance attended, but the teenager could not be saved.
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It comes amid increased concern about violent crime in London among teenagers and young adults.
The number of murder investigations in the capital so far in 2018 has exceeded 100.
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