Early in May American Jill St Onge, 27, and Norwegian Julie Bergheim, 22, fell ill while occupying adjoining ground-floor rooms 4 and 5 at the guesthouse, suffered similar vomiting attacks, and died within hours of each other at the holiday island's hospital.
Police General Nappadon Kantakanit told Phuketwan today that he assembled the latest investigation team, which included specialists from Phuket and Krabi provinces.
The return to the guesthouse for a complete forensics check came at the request of senior Royal Thai Police in Bangkok.
It is believed officials from the US and Norwegian embassies have been pressing for a resolution of the cause of death of the two young tourists as soon as possible.
''We checked the locality and the rooms where the women fell ill,'' General Nappadon said. ''We took away various spray cleaners and a vacuum cleaner, and the air-conditioning filters.''
Today he called Prince of Songkla University in Haad Yai, capital of Songkla province, and arranged for laboratories there to conduct tests on all the samples from the guesthouse.
The Governor of Krabi, Siwa Sirisaowalak, said he was not aware of the new police investigation. He has previously urged newspapers not to speculate about the cause of death, and to await the results of existing tests.
Police Lieutentant Pontanan Sangtong, who is based on Phi Phi, remains in charge of overall investigations.
At different times since the women died in early May, Public Health department officials, including epidemiologists from Bangkok, have also taken samples in and around the Laleena Guesthouse and checked the two rooms.
Bangkok laboratory tests continue on blood and tissue samples taken from the women's bodies. Samples were also taken for testing commissioned by the St Onge family in the US.
Laleena Guesthouse owner Rat Chuped believes the women died from something they ate or drank and has rejected suggestions that she should close the establishment until the cause is known.
Jill St Onge was travelling with her fiance, Ryan Kells, at the time, while Ms Bergheim was sharing her room with a younger Norwegian woman.
All four occupants of rooms 4 and 5 fell ill, but only two survived.
According to General Nappadon, the Norwegian survivor has told police of a ''bad smell'' at the time all four occupants of the rooms fell sick.
The water treatment plant nearby appeared to not be the source, he said, because other houses and guesthouses were closer to it than the victims at Laleena.
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Phi Phi Mystery Deaths: The Room Maid's Account
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Why Pursuing the Truth Matters for Tourism
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Dead Tourist 'Pushed off Phi Phi': Boyfriend
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Phi Phi Deaths: No Word on What Killed Women
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MediaWATCH: Tourist Death Theories Abound
Latest Internal Security Act coming for Phuket; International media seek clues to the deaths of two Phi Phi tourists; why travel is not dangerous; a swim to Burmese heroine Suu Kyi.
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Phi Phi Deaths: Cause 'May Take a Month or More'
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So until the respective Embassies pressed for conclusions, nothing was done and now, 3 weeks later samples are taken? What a tragic joke! I think I'll start a private Ex-Pat coroner service, with all the deceased western foreigners piling up. Nine since April 1 in Phuket/ Krabi region) I'll make a mint!
Posted by Ex- Pat Coroner on May 26, 2009 08:10