Tourism to Bali collapsed following the nightclub bombings of October 2002 in which 202 people were killed and the Government's subsequent warning against non-essential travel to Indonesia.

The lingering effects of a nightclub bombing had a major depressive effect on tourism, jobs, immigration from other islands, and traffic.

Similar letters, with distinctive block-style handwriting, were received after the nightclub bombing.

Jemaah Islamiyah has been linked to the nightclub bombings that killed more than 200 people last year on the Indonesian island of Bali.

The agents also said they were reasonably certain that the person who wrote anonymous letters mailed to several news organizations after the nightclub bombing was involved in the attacks.

He was captured by the Indonesian police in his village in East Java less than a month after the Oct. 12 nightclub bombing.

At a news conference today, officials with the multiagency task force also released excerpts from one of the nearly identical letters sent to four news organizations immediately after the nightclub bombing.

Investigators have said that they believe the Atlanta abortion clinic and nightclub bombings are linked to each other, and that they are increasingly confident that the park bombing is connected as well.

Some thought the attacks were a tactical mistake," referring to the 2002 nightclub bombing and an attack on a Jakarta hotel in 2003.

He also said the F.B.I. had yet to determine the authenticity of letters received by several news organizations after the nightclub bombing.