Koh Tao 'in shock' after British tourist murders

Thai police have admitted they are struggling to find the killers of two British tourists, after it emerged crime scene DNA did not match that of any of their initial suspects.

Hannah Witheridge, 23, and David Miller, 24, were found dead on a beach on the island of Koh Tao on Monday.

The BBC's Jonathan Head on the island said that it was clear that people there were in shock.