On 12 October 2002, a suicide bomber entered the Sari Nightclub in Bali, Indonesia, and detonated a bomb in his backpack. Fifteen seconds later, those fleeing the club were met with another attack when a powerful car bomb was detonated across the street at Paddy’s Irish Bar. The final death toll was 202, including seven Americans. These victims were citizens of more than 20 different countries, primarily young tourists on vacation. Hundreds of others suffered severe burns and other injuries. Several members of the Jemaah Islamiya terrorist group have been convicted in relation to this attack.

Dulmatin is believed to be one of the masterminds responsible for planning these attacks, which are the deadliest acts of terrorism in Indonesian history. He is an electronics specialist with training in al-Qa‘ida camps in Afghanistan, and is a senior figure in Jemaah Islamiya.