Four Pakistanis suspected of being members of an extremist group involved in the 1993 World Trade Center building in New York have been arrested in Bangkok, a newspaper said Saturday.

The English-language The Nation said the four were seized in a raid on an apartment by Thai Immigration Police and agents of the U.S. Federal Bureau of Investigation.According to sources quoted by the daily, the four were suspected of planning to assassinate U.S. Ambassador William Itoh and launch a terrorist strike against the embassy here.

The embassy spokesman could not be immediately reached for comment.

The 1993 World Trade Center bombing killed six people and injured more than 1,000 others. Six men were convicted in the United States between 1994 and 1997 in connection with the attack.

Last November, a New York court convicted a Pakistani, Ramzi Ahmed Yousuf, on murder and conspiracy charges. He was described as one of the masterminds of the bombing.

The Nation said the four men - Mohamad Rahim, 30, Hadja Pahu Sasa, 25, Hara Haj Husem, 26, and Hareef Husen, 25 - have been charged by Thai authorities for illegal entry.