Three men holding Turkish passport were allegedly plotting to attack Chinese interests in the ASEAN region. Thailand has put two of them on its security watch list after receiving an alert from Singapore, according to Hong Kong Economic Times.

The three Turkish men identified as Hid Yet Dursun, (male, Passport No. U07510463), Ali Yalcin Ergin (male, Passport No. U03217293) and Ali Yalcin (male, Passport No. U04601655) may have flown to Thailand, according to Thai authorities.

Thailand's immigration database showed Ali Yalcin, 36, have visited Thailand twice this year. He arrived at Don Mueang airport on March 18 from Singapore on an Air Asia flight and left for Cambodia on March 22. Yalcin re-entered Thailand on March 24 and left for Malaysia via Phuket International Airport on March 28. There was no record of a third entry, according to the report.

Police have been sent to gather more information in Sukhumvit and Phuket where Ali Yalcin was seen during his stay in the country, according to Thailand's immigration authorities.

On Aug. 17 2015, a blast at the Erawan Shrine in Bangkok, a tourist spot popular with visitors from China and elsewhere in Asia, killed 20 people and injured more than 120.

Thai policemen inspect the explosion site in Bangkok, Thailand, Aug. 17, 2015. (Photo/Xinhua)