The suspects are said to have dispersed to three popular tourist destinations with a view to carrying out attacks during the Christmas and New Year holiday, peak holiday season for foreigners drawn to Thailand’s beaches and bars.
In the document, Special Branch police urged an intensification of security around “target areas that Russian authorities are concerned about,” including venues associated with allies that have taken part in attacks on the Islamic State group in Syria.
Any confirmation that Islamic State militants have entered the country will likely cause panic among vacationers, especially in busy resort areas such as Phuket and Pattaya — both popular with Russians.
Russia launched airstrikes against Islamic State targets on Sept. 30 and has stepped up attacks in recent weeks.
A month later an affiliate of the militant group claimed responsibility for downing a Russian airliner over Egypt’s Sinai peninsula, killing all 224 people on board.
Thailand’s Special Branch, which deals with national security issues, circulated the document to other police units.
Marked “Urgent” and dated Nov. 27, the Special Branch police said intelligence from Russia warned that 10 Syrians “related to” the Islamic State group entered Thailand between Oct. 15 and Oct. 31. The document was circulating on social media on Thursday.
“The document is real. We received it from Special Branch,” said a police officers who handles international crime matters. He declined to be identified because of the sensitivity of the matter.
“The original communication was by word of mouth between Russian and Thai police. I don’t know how the document leaked.”
Police had not received warnings about Islamic State activity from any other foreign intelligence agency, Deputy Police Spokesman Songpol Wattanachai told reporters, adding that police had no information about their whereabouts, identity or possible targets.
“We’re still trying to work out whether they even came in,” he said, when asked if they could still be in the country.
National Security Council Chief General Thawip Netniyom said security units had been told to be vigilant.
“We have yet to find any unusual movement,” he told reporters. “Everything is safe, rest assured.”
The Immigration Bureau had found no irregularities among the 21 Syrians who remain in Thailand of the 231 that entered in October, bureau commissioner Nathathorn Prausoontorn said on Friday.
“There is no information linking them to Islamic State,” he said.
The National Security Council asked the bureau two weeks ago to check on Syrians that had entered since Oct. 1, he said.
The U.N. Office on Drugs and Crime estimates there are 700 to 1,000 foreign Islamist fighters in the region.
“There is a definite connection between Southeast Asia and Syria,” UNODC regional representative Jeremy Douglas said on Friday, adding that Thailand would need to work with its neighbors to deal with the threat.
“It’s very plausible that foreign fighters could transit through Bangkok to and from the Middle East,” he said.
The warning comes three months after a Bangkok bomb attack killed 20 people. Authorities said the blast was in retaliation for a crackdown on human smuggling gangs and declined to label it a militant attack.
A busy tourist destination and hub for businesses and international agencies, Thailand is a “target-rich environment,” said Anthony Davis, a Bangkok-based security analyst with IHS-Jane’s.
Corruption and the presence of transnational criminal groups had helped create “a dangerously permissive environment,” he said.
“Post-Sinai, Russian intelligence is going to be asking ‘Where globally are our vulnerabilities?’ Thailand is going to be right at the top of their list,” said Davis.
Thailand’s three southernmost provinces bordering Malaysia are home to a large Muslim community, elements of which have waged an insurgency against the Buddhist-dominated Thai state for more than a decade.
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