With an estimated 2,600 people injured, the Boston bombing remains the worst mass shooting in U.S. history.
The Associated Press has updated its list of the most deadly mass shootings since the Columbine High School massacre in 1999, with at least 10 other attacks occurring in the last two years.
The Associated Press list includes more than 400 incidents from April 5 to April 13.
The Boston Marathon bombing remains one of the deadliest in U-S.
Here’s how it ranks from the deadliest mass shooting of the 20th century:1.
The 1999 Columbine shooting killed 14 people and injured more than 300 in Colorado.
The shooting began at a party when a teenage boy and his friends became intoxicated and opened fire on the group, killing 10.
The gunmen had been planning the attack for some time.2.
In April 2015, gunmen stormed the offices of the National Rifle Association, which had been providing support for the Sandy Hook Elementary School shooting in Connecticut, and killed 26 people.
Three of those dead were the shooter, James Holmes, and he was later arrested.3.
In August 2017, gunmen killed five people and wounded nine in a shooting at a church in Sutherland Springs, Texas.
The attack began when a man opened fire with a rifle, killing at least 26 people, and wounding at least 20 others.4.
On May 6, 2018, an Islamic State militant detonated a bomb at a concert in St. Paul, Minnesota, that killed five and wounded 14 others.
The plotters had planned to attack the city’s largest public gathering.5.
On January 27, 2018 a group of attackers armed with handguns, machetes and a pipe bomb stormed a hotel in Brussels, Belgium, killing 32 people.6.
On April 10, 2018 in Portland, Oregon, a lone gunman opened fire at a crowded movie theater, killing nine people and injuring dozens.7.
On August 6, 2017, two gunmen dressed in camouflage entered a Planned Parenthood clinic in Colorado Springs, Colorado, and opened fired, killing two women and wounding several others.8.
On July 25, 2018 terrorists stormed the headquarters of the Islamic State in Iraq and Syria (ISIS) group in Syria, killing more than 30 people, including several police officers and civilians.
The bombing was the deadliest terror attack in the U., and the United States remains the most vulnerable country to an attack from a terrorist group.9.
In June 2019, a gunman opened a mass shooting at an outdoor music festival in Las Vegas, killing 58 people.10.
In July 2018, a white supremacist drove his pickup truck into a crowd of people at a baseball game in Portland Oregon, killing four people.