Portuguese police have insufficient evidence to arrest anyone in the hunt to find the kidnapper of a four-year-old British girl but are focusing on the resort where she disappeared, police said yesterday evening.

Madeleine McCann disappeared from her bedroom at a hotel resort in the Algarve two weeks ago as her parents dined nearby.

Chief inspector Olegario Sousa said police continued to follow their strongest lead in the investigation, which has centred on foreigners in the small Praia da Luz resort.

"The greatest concentration (of investigators) is in the Algarve and more concretely, in the zone," Mr Sousa told reporters. "At this moment we don't have enough evidence to arrest anyone."

Sousa said police had interviewed and searched the house of a computer technician in the resort, who has been identified by local media as a Russian man. Police took computers from the house and they "are now being examined", Sousa said.

The technician was questioned as a witness in the case but Mr Sousa said a "witness can become a suspect".

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