January 29: Jerusalem bus 19 massacre: Hamas and Al-Aqsa Martyrs' Brigades orchestrate a suicide bombing on a bus in Jerusalem, Israel killing eleven people and wounding more than 50.
February 6: Bomb on Moscow Metro kills 41.
February 27: Superferry 14 is bombed in the Philippines by Abu Sayyaf, killing 116, the world's deadliest terrorist attack at sea to date.
March 2: Ashoura Massacre: Suicide bombings at Shia holy sites in Iraq kill 181 and wound more than 500 during the Ashura.
March 2: Attack on procession of Shia Muslims in Pakistan kills 43 and wounds 160. (See also: Ashoura Massacre in Iraq.)
March 11: Coordinated bombing of commuter trains in Madrid, Spain, kills 191 people and injures more than 1,500. Al-Qaeda authorship.
March 24: Israeli soldiers arrest Hussam Abdo, a 15 year-old Palestinian boy with explosives strapped to his chest at the Hawara Checkpoint. The Al-Aqsa Martyrs Brigades sent Abdo on a suicide mission to bomb the checkpoint.
April 21: Bombing of a security building in Riyadh, Saudi Arabia kills five.
May 1: 2004 Yanbu attack kills six Westerners and a Saudi in Saudi Arabia.
May 2: Pregnant Israeli commuter Tali Hatuel and her four young children are gunned down at close range by militants from the Popular Resistance Committees and Palestinian Islamic Jihad.
May 29: Al-Khobar massacres, in which Islamic militants kill 22 people at an oil compound in Saudi Arabia.
July 24: A Uzbekistan, a suicide bomber detonates explosives at the US embassy in Tashkent, killing two Uzbek security guards.
August 4: A car bomb kills nine police officers in a rural area of southwestern Colombia. Rebel group FARC is blamed for the attack.[133]
August 16: Al-Qaeda in Iraq claimed responsibility for the bombings outside the restaurants in Dubai. 37 people including 4 Danish and 13 French were killed. The rest casualties were the local citizens. Estimated 200 were injured.
August 24: Russian aircraft bombings kill 90.
August 28: Shahawar Matin Siraj and James Elshafay are arrested for planning to bomb the 34th Street–Herald Square subway station in New York City during the 2004 Republican National Convention.
August 31: A blast near a subway station entrance in northern Moscow, caused by a suicide bomber, kills ten people and injures 33.
September 1 – 3: Beslan school hostage crisis in North Ossetia, Russia, results in 344 dead, mostly children.
September 9: Jakarta embassy bombing, in which the Australian embassy in Jakarta, Indonesia was bombed, killing 8 people.
October 7: Sinai bombings: Three car bombs explode in the Sinai Peninsula, killing at least 34 and wounding 171, many of them Israeli and other foreign tourists.
October 28: Two people killed, 38 injured by two explosions in southern Thailand.[134]
November 2: Theo Van Gogh is murdered by Mohammed Bouyeri in Amsterdam, Netherlands for his criticism of Islam.
December 6: Suspected al Qaeda-linked group attacks U.S. consulate in Jeddah, Saudi Arabia, killing five local employees.
December 12: A bombing at the Christmas market in General Santos, Philippines, kills 15.