On the night of 12 October 2002, a coordinated terrorist attack struck the tourist district of Kuta on the Indonesian island of Bali. At 11:05 p.m., a suicide bomber detonated an explosives vest inside the nightclub Paddy's Pub. Approximately twenty seconds later, a second suicide bomber detonated a large car bomb packed in a Mitsubishi L300 van outside the Sari Club, an open-air bar across the street. A third, much smaller device exploded outside the United States consulate in Denpasar, causing only minor injuries and property damage. The attacks killed 202 people—151 Westerners, 38 local Indonesians, 10 nationals of six other countries, and 3 unidentified victims—and injured a further 209, making it the worst terrorist act in Indonesia's history. The largest single national group among the dead were Australian tourists, with 88 fatalities. On 14 October 2002, the United Nations Security Council passed Resolution 1438 condemning the bombings as a threat to international peace and security.
Investigators determined the Sari Club bomb was built from a mixture of potassium chlorate, aluminium powder, and sulfur packed into twelve plastic filing cabinets, connected by detonating cord and fitted with electric detonators, with a total weight of roughly 1,020 kilograms. Indonesian police identified the plot as the work of Jemaah Islamiyah, an Islamist militant organization. The arrest of Amrozi bin Nurhasyim, based on evidence including chemical residue, purchase receipts, and mobile phone records, led investigators to a wider network of suspects, including Ali Imron, Imam Samudra, Dulmatin, Idris, Abdul Ghani, and Umar Patek.
Legal proceedings followed over subsequent years. Amrozi bin Nurhasyim was sentenced to death on 8 August 2003 for buying explosives and the van used in the bombings. Imam Samudra was sentenced to death on 10 September 2003. Ali Imron, Amrozi's brother, received a life sentence on 18 September 2003 after expressing remorse. Ali Ghufron, alias Mukhlas, was sentenced to death on 1 October 2003 and told police he had ordered the bombings as a Jemaah Islamiyah cell leader. Amrozi, Imam Samudra, and Mukhlas were executed by firing squad after midnight on 9 November 2008 at the Nusakambangan island prison. Abu Bakar Bashir, alleged spiritual leader of Jemaah Islamiyah, was convicted on 3 March 2005 of conspiracy in relation to the Bali attacks and sentenced to two and a half years; his earlier acquittal on treason charges and a separate later conviction related to different bombings had varied outcomes, and his Bali-related conviction was ultimately overturned by Indonesia's Supreme Court in December 2006. Bomb-maker Azahari Husin was killed in a police raid in November 2005, and Dulmatin, believed to have detonated one of the Bali bombs, was killed in a shootout with police in March 2010. Umar Patek was arrested in Pakistan in early 2011, and Zulkarnaen was arrested in Indonesia in December 2020.
The bombings prompted numerous memorials in Bali, Australia, the United Kingdom, and elsewhere, and led to formal recognition of rescuer heroism under Australia's honours system, including the Cross of Valour and Star of Courage.