Police are looking for five young people after a woman was attacked in the street.
The 26-year-old victim was left with serious injuries after a "vicious and unprovoked attack" in Clydebank, Scotland, officers said.
Detectives are now appealing for information after the woman was assaulted in the early hours of Sunday.
The woman, who was out with a friend, was taken to the Queen Elizabeth University Hospital with injuries described as serious but not life-threatening.
The five suspects were all about 17 years old, according to a police press release.
One was approximately 5ft, with brown hair, wearing a dark jacket and a black beanie hat and a second was wearing a luminous pink top and dark bottoms.
A second was wearing a luminous pink top and dark bottoms, while the other three were all wearing dark clothing, Police Scotland said.
Detective Constable Imran Abuzar, from Clydebank CID, said: "This was a vicious and unprovoked attack and we can only be thankful that the injuries were not even more severe.
"We are aware that there were a number of people and motorists in the area around the time of the incident, so are appealing to anyone who witnessed the attack, or believes they saw a group of men matching the descriptions, to please come forward."
Anyone with information should call the police on 101, quoting incident 0024 of December, 12.
Alternatively, contact Crimestoppers on 0800 555 111, if you wish to remain anonymous.
