The mother and brother of a Scots woman who has gone missing in Spain have flown out of the country in order to assist Spanish police with their search for the 32-year-old.

Lisa Brown, originally from Dumbarton, went missing on November 4 from her home in San Roque near the upmarket resort of Sotogrande.

Her disappearance was not reported until five days later. She had been due to start a new job in Gibraltar.

Officers are understood to have questioned her boyfriend and a former partner, thought to be her child’s father. Their nationalities are not known.

A force spokesman said: “All avenues are being explored. No theory has been ruled out.”

Ms Brown was last seen in Guadiaro, five miles from the home she shares with her current partner and young child.

A spokesman for Spain's force, La Guardia Civil, said: “The investigation is ongoing and we are not in a position to go into detail at this stage.”

Royal Gibraltar Police (RGP) are assisting the inquiry because Ms Brown worked for a Gibraltar-based gaming firm until August. She was due to start a new job in the British territory the day after she went missing.

In a statement, the force said: “The RGP is currently assisting the Spanish authorities in their inquiries into the reported disappearance of Ms Brown.”

Spanish police have restricted any access to her property as part of their ongoing investigation and Ms Brown's mother and brother have travelled to Spain to help with their inquiries.

A Foreign Office spokesman said: "We are liaising with local authorities and providing assistance to the family of a British national who was reported missing in Spain."

Ms Brown left Scotland when she was a teenager.

Her sister Helen Jordan, who lives in Dumbarton, is using social networking sites to plea for information on her whereabouts.

Mrs Jordon described the disappearance as “completely out of character."

She said: “We’re obviously very worried as it’s completely out of character for her to go missing like this.

“Thanks to everyone for the shares, prayers and the many phone calls and messages.”

Inspector William Gomez of the RGP said: “Ms Brown worked at Ladbrokes until August and was due to start a new job in Gibraltar the day after her disappearance.

“We were asked for assistance by the Guardia Civil and are in the process of making inquiries which include contacting ex-work colleagues and friends she has here to see if they can shed any light on her disappearance.”