UPDATE: A 19-year-old man has been arrested in connection with this alleged serious sexual assault. He has been bailed pending further police inquires.
An 18-year-old was allegedly seriously sexually assaulted near Wind Street on Sunday night, when the area was busy with students attending a Carnage UK event.
The alleged assault took place around midnight in bushes on the Strand, at the junction with Quay Parade.
South Wales Police are investigating the incident and are appealing for information.
Detective Inspector Dave Hough said: “We are appealing for anyone who was in the area at this time or who may have any information which could assist officers in the investigations to come forward.
“I want to reassure the public that an incident such as this is extremely unusual and a rarity.”
“If anyone has any information about the incident then please contact the police.”
Anyone with any information is asked to contact Swansea CID Sapphire Team on 101 or anonymously via Crimestoppers on 0800 555111 and quote reference 62130331421.