The man grabbed the woman, but she called out and waved her dog at him, causing him to run away.

The Police Service of Northern Ireland (PSNI) is investigating the possibility that this attack is linked to an attack in Drumahoe on Friday.

After the attack on Saturday, police searched the area, but the man had left the area.

The suspect is believed to be heading in the direction of Corrody Road.

He is described as a white man in his 20s, approximately 1.83 m (5 ft 11 in) tall, of slim build, and wearing all black clothing.

The attacker reportedly pulled his hood tightly over his face.

Dt Insp Ross Olphert said in a statement: “We understand that a second stabbing attack on a woman in just two days will cause concern in the community, with this latest occurring during daylight hours, but I can reassure residents that there is a highly visible police presence in key areas such as our local parks.” “A tactical patrol plan has been implemented and police presence will be increased throughout the city in the coming days.”

The PSNI said investigations were continuing to establish whether there was a link between the two attacks in County Londonderry.

Police said there was no connection between the two attacks over the weekend and earlier attacks in the city center last week.

Police appealed for anyone with information to come forward.