Police are urging guests at a seafront hotel to come forward as they might have vital information to help their search for missing Robbie Crofts.

Officers disclosed they are using the North West underwater search and marine unit, Coastguard and air operations group in the hunt for the 21-year-old.

The body of Robbie's girlfriend Hayley Holmes was found on the beach at Fort Perch Rock in New Brighton, at 7am on Monday.

A post mortem examination established the cause of death as drowning.

A pair of women's sandals and a pair of men's Converse trainers were found close to where Hayley's body was discovered by a dog-walker on Monday morning, along with a mobile phone.

Robbie was last seen by his parents at around 8pm on Sunday night. Detectives believe the pair had spent Sunday together in Liverpool city centre at the Mathew Street Festival.

Detectives strongly believe the trainers and phone belong to Robbie and the sandals were Hayley's.

They are extremely concerned for Robbie's safety and welfare and are appealing for anyone who has seen Robbie since Sunday night to get in touch.

Detective Chief Inspector Ian Hassall said: "It has now been three days since anyone last saw Robbie and we are growing increasingly concerned for his wellbeing and are continuing to conduct land and water searches for him.

"It has come to our attention that the Travel Lodge, Marine Point in New Brighton was fully booked over the bank holiday weekend.

"The hotel is near to place where the shoes were found and I would appeal to anyone who was staying at the hotel on Sunday evening who may have seen Hayley and Robbie to get in touch.

"We are understandably very concerned about Robbie, as are his family, and we would appeal for anyone with any information, no matter how small, to get in touch.

Robbie, who is from New Brighton, is of stocky build and around 5ft 8ins tall, with blue eyes and short black hair.

Anyone with information should call Birkenhead CID on 0151 777 2265.