A pistillate assaulted astatine knifepoint successful a sexually motivated onslaught managed to combat disconnected her attacker with a torch, constabulary person said.
Police person begun an probe into the onslaught successful Drumahoe successful County Londonderry.
Around 22:00 BST connected Friday a pistillate successful her twenties was walking successful Drumahoe Park erstwhile a antheral approached her from behind.
The antheral punched the pistillate to the broadside of her head, pulled her into adjacent trees and pushed her to the crushed astatine knifepoint, the Police Service of Northern Ireland (PSNI) said.
'Fled the scene'
After a conflict the pistillate managed to onslaught the attacker successful the look with her torch a fig of times earlier breaking escaped and moving for help.
The PSNI instantly responded to hunt for the attacker but helium had fled the scene.
Detective Inspector Ross Olphert said: “Understandably the unfortunate has been near traumatised and highly distressed by this ordeal.
"Our specializer officers are continuing to enactment her contiguous and a afloat probe is underway.
"Attacks similar this are an onslaught connected each of us. Women should beryllium escaped to spell astir their lives escaped from immoderate threat," helium added.
The PSNI are appealing to anyone who was successful the parkland connected Friday evening to travel guardant with information.