Officers from the Metropolitan Police have released an E-FIT image of a man wanted in connection with a spate of knifepoint robberies in Brookmill Park SE8.
Three incidents were recorded on Monday, 30 and Tuesday, 31 August, and Thursday, 2 September.
All of the incidents occurred in the evening between 7:45pm and 10pm.
In each case the suspect approached couples as they were sat on a bench in the park before pulling a knife and robbing them of their mobile phones.
In the incident on 31 August, a man in his 20s suffered a number of stab injuries. He was rushed to hospital where his injuries were assessed as non life-threatening, he continues to recover.
All of the victims have described the suspect as being a black male, 6ft tall, of skinny build, who was wearing a face mask and hood.
Police have not received any further reports since the last incident.
Detectives are urging anyone who thinks they might be able to identify the man in the E-FIT to make contact immediately.
At this time there have been no arrests.
Detective Constable Amy Burnell said: “I would like local people to look closely at the E-FIT we have issued and think about whether you recognise him.
“Information as to his identity can be provided to 101. Please work with us to help catch this man and remove him from the streets.”
Any witnesses or those with information are urged to call 101 ref CAD 7037/31 Aug.