TWO British brothers have been questioned by police investigating the brutal murders of two Britons in Thailand.

The bodies of David Miller, 24, and 23-year-old Hannah Witheridge were discovered on a beach on the island of Koh Tao on Monday.

A spokesman for the Royal Thai Police said brothers Christopher and James Ware had been questioned about the deaths, along with 11 Burmese suspects. None of those questioned are in custody.

A police spokesman said: "We have spoken to two British men but they have not been detained. We cannot rule them out. They were close friends and knew all about the victims.

"We have got to do whatever it takes to obtain concrete evidence."

Earlier police said "strong evidence" had led them to a number of Burmese suspects after blood stains were found on some of their clothes.

The two victims both suffered deep wounds to the head and face, police said.

A bloodstained garden hoe, believed to be the murder weapon, was found nearby.

Post-mortem examinations had shown Miss Witheridge died from head wounds while Mr Miller died from severe blows to the head and drowning.

British consular officials from the Thai capital Bangkok have travelled to the island to liaise with local officials.