A 44-year-old woman has been reportedly raped in Victoria Park on Saturday afternoon.
The Met have said that the incident took place near the Pavilion Cafe between 5pm and 6pm.
The victim said that she was walking through the park when she was attacked by a man from behind.
Numbers of reported rapes in Hackney has reduced since last year. Each year, 24 people have been convicted.
CCTV from the area is being examined but no arrest have been made.