Police investigating the disappearance of a teenage girl have questioned a 19-year-old aspiring actor and his 71-year-old grandmother on suspicion of murder, as her family urged people to continue looking for her.

Gaia Pope, 19, from Langton Matravers in Dorset, was staying at a relative's home in Swanage when she went missing on the afternoon of November 7.

On Tuesday morning, Dorset Police arrested friend Nathan Elsey and his grandmother Rosemary Dinch in connection with the disappearance.

Mr Elsey, who is studying drama, had a part as an extra in the Second World War epic, Dunkirk.

Mrs Dinch said Miss Pope had visited her house in an agitated state around the time she disappeared.

Speaking to reporters, before her arrest, she described how Miss Pope had banged on her front door asking for help.