Detectives investigating the disappearance of Gwenno Epharim are appealing for another potential witness.

The 22 year-old was last seen in the Upper Bangor area on Monday 28th July and is thought to have walked to the Menai Suspension Bridge.

North Wales Police say the drivers of three cars and a cyclist have come forward after releasing CCTV pictures earlier this week.

But they're still trying to identify a female pedestrian who was spotted crossing on the opposite side of the bridge at around 11.10pm, when Gwenno is thought to have reached the location on her own.

Emergency services, including lifeboats and the Coastguard helicopter have been combing the Menai Strait, where it's believed Gwenno may have entered the water.

Personal items, thought to belong to her, were discovered on the Menai Suspension Bridge the following morning.

Chief Inspector Stephen Pawson said: “Searches remain underway in the Menai Strait area, and we continue to provide support to Gwenno’s family during this extremely difficult time."

“CCTV footage of the time Gwenno was walking alone also captures a female pedestrian crossing on the opposite side of the bridge.”

“We are continuing to appeal for this individual to come forward and assist with the investigation."

“A cyclist and drivers of three cars who were all seen travelling across the Menai Bridge at the around the same time have since been identified, following an earlier appeal this week."

"We are grateful to everyone who has assisted with our investigation to date."