Two teenage girls were reportedly sexually assaulted by two men in Ormeau Park in south Belfast on Saturday night.
The incident happened sometime between 8:30pm and 10:30pm.
One of the men is described as having short ginger hair and a ginger beard. He is believed to be approximately 6ft tall, of a thin build and he is thought to be aged in his early 20s. He was reportedly wearing a dark-padded jacket.
The second man is described as having short hair, of thin build, approximately 6ft tall and is also thought to be aged in his early 20s. The men are reported to have had a dog, possibly a bulldog, with them.
Detective Inspector Leah Crothers said police are working to establish the circumstances of what occurred, and are appealing for anyone who has any information that could assist with the investigation to contact them.
“In particular, we are keen to hear from anyone who may have been in Ormeau Park between 8:30pm and 10:30pm, and saw two men matching these descriptions, or has footage of them in the park to contact us.
“We would also like to speak to anyone who was travelling on the Ormeau Road between 10:50pm and 11:20pm to check their footage to see if they have captured footage of men matching these descriptions.
“Anyone who can assist our investigation is asked to call detectives on 101, quoting reference number 2232 of 13/06/20,” she said.
And she added: “You can also submit a report online using our non-emergency reporting form via http://www.psni.police.uk/
“Crimestoppers can be contacted anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/“.