Four Pakistani men yesterday remained in Thai police custody as officials played down reports linking them to the 1993 World Trade Centre bombing in New York and planned attacks on US targets in Thailand. Thai and US immigration officials denied reports linking the men - arrested in a central Bangkok apartment in a rare joint Thai-FBI raid on Friday - to the bombing, but stressed investigations were continuing. They also publicly denied the men were under suspicion of involvement in a plot to assassinate outgoing US Ambassador to Thailand William Itoh. The only charge the men, all Pakistani passport holders, have faced is illegal entry to Thailand. They were yesterday taken to Bangkok's Dusit District Court, convicted of overstaying, and each fined 2,000 baht (HK$390). The raid, following an FBI tip-off, was supposed to be secret. Detailed coverage in the Thai press has embarrassed officials involved. 'Matters are still unclear but we are expecting more information on the men to be arriving from the US,' one senior police officer said. 'They will be held at least until then.' Both Thai and US agents had interviewed the men at length concerning illegal activities in Thailand related to Muslim extremist groups.