Timeline of deadly US shootings over 25 years

At least one gunman opened fire inside a center for the disabled in San Bernardino, California on Wednesday, killing 14 people and wounding the same number before fleeing the scene.

Here is a timeline of some of the worst mass shootings in the United States over the past 25 years:

A man shoots dead 23 people in a restaurant and then kills himself.

Two teenage boys shoot and kill 12 fellow classmates and a teacher at Columbine High School before killing themselves.

A stock-market trader goes on a day-long shooting rampage, killing 12 people, including his wife and two children, before taking his own life.

A teenage boy kills two people at his grandfather's home on an Indian reservation and then goes to his local high school, where he kills seven others before committing suicide.

A student goes on a rampage at Virginia Tech University, killing 32 people before committing suicide.

A man dressed in a Santa Claus suit opens fire at a family party and then sets fire to the house. Nine people are killed. The gunman commits suicide.

A gunman shoots dead 13 people at a civic center for immigrants.

US army psychiatrist Major Nidal Hasan opens fire at his military base, killing 13 people and wounding 42, before being overpowered by police.

A male nursing student methodically kills seven people at a Christian university.

A man kills 12 people when he opens fire at a movie theater showing a late-night premiere of a Batman film in a suburb of Denver.

A white supremacist and US army veteran fatally shoots six people and wounds four others at a Sikh temple before taking his own life.

A young man kills 26 people, including 20 children at Sandy Hook elementary school. He also fatally shoots his mother. He commits suicide.

A gunman kills six people in a shooting rampage at an apartment building, taking two people hostage before being killed by police after a lengthy standoff.

A gunman fatally shoots 12 people at a naval base in the US capital. The gunman is killed by police.

A white gunman kills nine people at a historic black church in Charleston, South Carolina.

A gunman goes on a shooting rampage at a college in the western state of Oregon, killing nine people and wounding several others before he committed suicide.

A shooting inside a center for the disabled leaves at least 14 dead and wounds the same number in San Bernardino, California.