Thailand murders: Images released of holiday island suspect
CCTV images of an Asian man have been released in the hunt for suspects in the murder of two Britons.
Investigators said they were looking for a number of people - but have ruled out other British tourists.
The bodies of David Miller (24) from Jersey, and Hannah Witheridge (23) from Great Yarmouth, Norfolk, were discovered semi-naked on a beach in the divers' paradise of Koh Tao.
Ms Witheridge was described by her family as "a beautiful, intelligent, loving young woman who poured joy into the lives of all who knew her", while Mr Miller was a "hard-working, bright and conscientious" young man who would be "sorely, sorely missed".
In a statement, Ms Witheridge's family said: "She was selfless and caring and made each and every day that little bit more wonderful.
"Our family are utterly devastated and shocked by what has happened to our beautiful Hannah. To lose her in the way that we have is beyond comprehension.
"We are heartbroken and no words can possibly describe how we feel. As such, we would be extremely grateful to be left in peace while we come to terms with our loss."
Mr Miller's family said: "David was an artist by temperament, so talented. He had a creative eye that he carried with him through life and in his degree.
"He was hard-working, bright and conscientious, with everything to look forward to.
"David was very giving to his family and friends and we all adored him. He will be sorely, sorely missed."
Mr Miller finished studying civil and structural engineering at Leeds University in June, where he was on course to achieve a first-class degree.
He left Jersey on July 18 to undertake a six-week work placement as part of a scholarship at a mining company in Australia before travelling on to Thailand for a break with a close friend.
He had been due to leave Thailand yesterday, and was looking forward to spending more time travelling in south east Asia before returning home.
The bodies of the two Britons were found on a rocky section of the shore around 100 yards from the scene of a beach party.
Police said they sustained horrific injuries, with both suffering deep wounds to the head and face. A bloodstained garden hoe, believed to be the murder weapon, was found nearby.