Police were called to Gillespie Park near Arsenal Underground station soon before 7pm yesterday (October 14).
A woman was walking through the park when a man who was “hovering near some bushes” emerged and tried to rape her.
She fled the scene a second man chased after the attacker.
Officers want to talk to this second unknown man, who they see as a potential witness.
The suspect is described as black, around 5ft 8in and dressed in dark clothing.
A crime scene is currently in place in the park as enquiries continue.
Detective Chief Inspector Paul Ridley, from the Central North Public Protection Team, said: “This was an attack targeting a lone female in an open park space. We’d like to reassure the public that we are working at pace to try and find this suspect.
“We’d really like to speak to the man who chased after the suspect, as he may have some crucial details to help us identify him.
“The location is used to access nearby Finsbury Park and Arsenal Underground Station and therefore frequented by commuters who may have seen or heard the attack or who may have also noticed the suspect in the area prior to the incident.
“Or if you have noticed any concerning behaviour in the area recently please let us know. Even the smallest bit of information could make a real difference in our investigation.”
Anyone with information is asked to contact police on 101, or online, quoting 6576/14OCT.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.
