NEW YORK (Reuters) - A Bangladeshi man set off a homemade bomb strapped to his body at a New York commuter hub at rush hour on Monday, wounding himself and three others in what New York Mayor Bill de Blasio called an attempted terrorist attack.
Mass transit systems have come under attack around the world.
Here are several notable incidents:
Sept 15, 2017 - London: A homemade bomb on a packed rush-hour commuter train in London engulfed a carriage in flames and injured 30 people, but apparently failed to fully explode. Some people suffered burns and others were injured in a stampede to escape the station. A teenager who moved to Britain after his parents were killed in Iraq is scheduled to go on trial in March.
June 20, 2017 - Brussels: A Moroccan national tried to detonate a suitcase bomb packed with nails and gas bottles at the Central train station. A soldier fatally shot the man, who prosecutors said was suspected of supporting the radical group Islamic State in Iraq and Syria (ISIS). The bomb, which partly detonated, did not hurt anyone.
March 22, 2016 - Brussels: A suicide bomber detonated a bomb on a train in the city's downtown Maelbeek subway station, about an hour after bomb attacks on the main airport, killing at least 30 people.
July 7, 2005 - London: Four British Islamists carried out suicide bomb attacks on three London subway trains and a bus, killing 52 people.
March 11, 2004 - Madrid: Ten bombs packed into sports bags and detonated by cellphones tore through four commuter trains, killing more than 190 people and injuring more than 1,800. Three weeks later, seven men blew themselves up in a suburban apartment after police closed in on them.
March 20, 1995 - Tokyo: Members of the Aum Shinrikyo doomsday cult released sarin nerve gas in coordinated attacks on the subway system during the morning rush hour, killing 13 people and sickening thousands of others.
December 1994 - New York: A firebomb exploded on a crowded subway train in lower Manhattan, injuring 48 people, including the bomber, Edward Leary, 50.
Six days earlier, a firebomb planted by Leary went off on a subway in Manhattan's Harlem section, injuring two teenagers. Leary drew a 94-year prison sentence for the two bombings.