Detectives investigating the disappearance of Swanage teenager Gaia Pope have released a man and a woman under investigation.

A 19-year-old man and a 71-year-old woman, both from the Swanage area and known to Gaia, were arrested on suspicion of murder on Monday.

The 71-year-old woman, named locally as Rosemary Dinch, has now been released.

She is the last person known to have seen Gaia, at her home in Morrison Road.

The 19-year-old man named locally as Nathan Elsey - Ms Dinch's grandson and an aspiring actor said to have appeared as an extra in Christopher Nolan's 2017 war epic Dunkirk - has also been released under investigation.

Mr Elsey's grandfather Gregory told the Echo his family are concerned about his welfare as he is "vulnerable" with special educational needs, and has been in custody overnight.

They had not spoken to him since his arrest.

He said Ms Dinch, his ex-wife, suffers from advanced chronic obstructive pulmonary disorder and has to take regular oxygen.

On Monday night she appeared on BBC South Today saying the 19-year-old banged on her door last Tuesday.

"There was a sort of "help me" bang [on the door]. "Please help." A pounding.

"She was upset, very upset. She didn't have a seizure. I'm pleased because I gave her a cuddle and she responded.

"Of course I want her found, I have no idea where she is.

"She just seems to have disappeared."

Gaia, 19, and from Langton Matravers, was staying at an address in Swanage when she disappeared on the afternoon of Tuesday November 7.

CCTV released last week showed Gaia running along Morrison Road in Swanage.

Search warrants took place at two addresses in Swanage late on Monday afternoon and police were seen at an address in Morrison Road on Tuesday morning.

Senior Investigating Officer Neil Devoto, of Dorset Police's major crime investigation team, said: "It has been almost a week since Gaia's last confirmed sighting and she has not been seen or heard from since.

"We have looked through CCTV that covers the Swanage area, including transport hubs, and there is nothing to suggest she has left the area.

"Her disappearance is completely out of character and, following our extensive enquiries, we sadly now believe that she may have come to harm.

"We have not yet found Gaia and our searches will continue. I would appeal to anyone who has information about her disappearance to please contact Dorset Police.

"Our specially-trained officers have updated Gaia's family and are supporting them at this very difficult time."

Hundreds of people have scoured areas of Bournemouth, Swanage, Poole and surrounding areas in the hope of finding Gaia.

‘Missing person’ leaflets with Gaia’s picture on have also been taped to lamp-posts, pinned to noticeboards and left in shops and community halls around the county, and new images of the teenager have been shared on social media.

Search efforts have been ongoing since Tuesday in the Swanage area and police confirmed they will continue.

The search has been supported by the coastguard, NPAS helicopter and volunteers from Dorset Search and Rescue and Wessex 4x4. Members of the local community have also been assisting with searches.

Investigations have also involved CCTV and house-to-house enquiries.

Vehicle stop checks took place in the Swanage area on the afternoon of Friday November 10.

Anyone with information about Gaia’s whereabouts is asked to call 101, quoting incident number 9:179.