PARIS: The series of bombings that killed more than 320 people in Sri Lanka are among the deadliest such attacks worldwide since the 2001 strikes on the United States, reports AFP.
Here are some others.US, 2001: 2,977 killed
On September 11 two hijacked planes are slammed into the twin towers of the World Trade Center in New York and a third is smashed into the Pentagon in Washington DC.
A fourth, apparently headed for Washington, crashes into a field in Pennsylvania after passengers and crew fight the hijackers.
The attacks are claimed by Al-Qaeda. In New York, 2,753 people are killed; 184 die at the Pentagon as do 40 passengers and crew in the fourth plane.
Somalia, 2017: 512
A truck bomb explodes in a busy commercial district of the capital Mogadishu on October 14, killing 512 people, according to the official toll.No one claims responsibility but the attack, the deadliest in the country, is widely blamed on the Shabaab Islamist group linked with Al-Qaeda.
Russia, 2004: more than 330
On September 1 a commando of Islamist Chechen rebels seizes a school in the North Ossetia city of Beslan, taking around 1,200 hostages including 800 children.
After 52 hours of fruitless negotiations, special forces storm in. More than 330 civilians and security forces are killed, including 186 children.
Iraq, 2016: 323
On July 3 an explosives-packed minibus blows up in a Shiite area in central Baghdad that is crowded with shoppers just before the end of the fasting month of Ramadan.
The attack kills 323 people and is claimed by the Islamic State group.
Egypt, 2017: 305
On August 24 about 30 gunmen brandishing the IS flag open fire in the al-Rawda mosque, which is associated with Sufis, in the northern Sinai Peninsula.
The attack kill at least 305 people, including 27 children.
Syria, 2018: 252
On July 25 the IS group carry out a string of attacks in the Syrian province of Sweida, south of the capital Damascus, targeting the Druze minority.
The suicide bombings, shootings and stabbings kill 252 people, mostly civilians, according to the Syrian Observatory for Human Rights.
Bali, Indonesia, 2002: 202
On October 12 bombings on a bar-restaurant and a discotheque on the island of Bali leave 202 dead, most of them Western tourists.