Gardai are treating a random attack on a woman walking on her own as a serious attempted sexual assault.
Supt Gerry Curley said there is no doubt there was a sexual motive.
The incident happened on Thursday evening on the Tain Walk, a popular pedestrian link between the Inner Relief Road in Dundalk and the Newry Road.
Supt Curley said a man app-roached the victim from behind and the woman "struggled with this person and she managed to pull herself away and he left".
The woman, who is in her 20s, was walking on her own between 7.40pm and 7.50pm. She did not know her attacker.
"This is a random attack. She did not know who this person was. She was just out for a walk," Supt Curley said.
Gardai said they were looking for the public's assistance and any information.
Supt Curley added: "We know the culprit walked on to the Inner Relief Road, so that is why we are looking for dashcam footage."
The attacker is said to be in his 20s, over six-foot-tall, skinny and with a tight haircut.
The woman did not need hospital treatment.
Supt Curley said it was a "serious attempted sexual assault", and "obviously if a female is attacked by a male in a situation like that, one would have to think there may have been some more purpose to it".
After she fought off her attacker, the woman raised the alarm and contacted gardai.
"This was a very frightening incident for the woman and we would like to catch the person responsible," said Supt Curley.
The man left the area on foot, and gardai appealed to anyone who witnessed the incident or has information to contact Dundalk Garda Station on 042-9388400 or the Garda Confidential Line on 1800 666 111.
Gardai would also like to speak with any drivers with dashcam footage or cyclists who were on the Newry Road or the Inner Relief Road at the Tain Bridge area at the time of the incident.
They are asked to check their dashcam footage and contact Dundalk Garda Station.