Police in Thailand are investigating the killing of two British tourists -- David Miller, age 24, and Hannah Witheridge, 23, in southern Koh Tao Island.<br/> <br />Both bodies were found naked with head wounds.<br/> <br />On Saturday, police confirmed that the suspects are Asian, and are now waiting for more DNA results.<br/> <br />(SOUNDBITE) (Thai) ACTING POLICE CHIEF, SOMYOT PUMPANMUANG SAYING:<br/> <br />"The institute in Singapore is testing the DNA to tell us about skin color, eyes color, which will be another step further in identifying the suspects."<br/> <br />Police found the DNA of two people in semen taken from Witheridge's body.<br/> <br />The autopsy also revealed that water was found in Miller's lungs, suggesting he could have been drowned.<br/> <br />On Friday, police collected more DNA from 30 locals and migrant workers in the area.<br/> <br />Tourists were shocked by the news.<br/> <br />(SOUNDBITE) (English) TOURISTS FROM NEW ZEALAND, KATIE JONES SAYING;<br/> <br />"It's horrible and it's devastating. But it's not n
