Thailand murders: Police offer £13,000 reward
A reward of more than £13,000 has been offered as Thai police try to find the killers of two British tourists.
David Miller, 24, and Hannah Witheridge, 23, were found dead on the island of Koh Tao on 15 September.
A group of Thais who had been playing football have become the latest to be questioned by detectives.
DNA samples have been taken from "more than eight" of the group who reportedly threw a party at the nightclub where the victims spent their final hours.
Colonel Kissana Phathanacharoen of the Royal Thai Police said a reward of 700,000 baht (£13,300) - was being offered for information leading to arrests of the culprits.
"We're trying to narrow our inquiries and collect more evidence. We're encouraging the public who may have information to come forward," he said.
"We're checking DNA but this is not the only thing we are looking at to prosecute the suspects."
Post-mortem examinations revealed that Ms Witheridge, from Great Yarmouth, died from head wounds; Mr Miller, from Jersey, was killed by severe blows to the head and drowning.
A bloodstained garden hoe, believed to be the murder weapon, was found nearby.
About 150 police officers were posted to Koh Tao as part of the murder investigation.
A group of Burmese migrants who were interviewed by police after bloodstains were found on their clothes have been eliminated from inquiries because no matches were found between them and DNA found on Ms Witheridge and a cigarette butt at the scene.