Armed police rushed to the scene on Lucas Street, Lewisham, at 3am this morning.
Officers found a woman in her late teens suffering from a gunshot wound on her arm.
The girl was rushed to hospital where she is not in a life-threatening condition.
A spokesman for the Metropolitan Police said: “Police were called by LAS at 03:11hrs on Saturday, 23 April to Lucas Street SE14 following reports of a shooting.
“Specialist firearms officers were among those who responded.
“Following a search a woman, aged in her late teens, was found with a gunshot injury to her arm in Lewisham Way.
“She was taken to hospital; her condition is not life-threatening or life-changing.
“A number of crime scenes are in place. A number of bullet casings have been recovered and sent for specialist analysis.
“At this early stage there have been no arrests.”
Detectives have launched an investigation into the shooting.
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