The recent shooting incident at a school in Newtown, Connecticut which saw the killing of 20 children has shocked US President Barack Obama (pic) and the world.

This gruesome episode adds to the growing list of shooting incidents in the USA.

Here are some of the incidents compiled by Astro Awani;

2012

April: A lone gunman killed seven people and injured three others at a small Korean Christian college in Oakland, California.

July: A masked gunman opens fire in a cinema at the midnight screening of Batman: The Dark Knight Rises, killing 12 and injuring 58 people in Colorado.

August: A former employee at a women's fashion accessories shop shot an ex co-worker outside the Empire State building.

August: An employee at a suburban New Jersey supermarket opened fire in the store killing two co-workers before taking his own life.

August: Six people at Sikh temple in Wisconsin before being shot dead by police.

September: A manufacturer lost his job, then opened fire, killing five in Minneapolis.

1999-2011

1999 (April): Two teenage schoolboys shot and killed 12 schoolmates and a teacher at the Columbine High School in Littleton, Colorado, before killing themselves.

1999 (July): A stock exchange trader in Atlanta, Georgia, killed 12 people including his wife and two children before taking his own life.

1999 (September): A gunman opened fire at a prayer service in Fort Worth, Texas, killing six people before committing suicide.

2002 (October): A series of sniper-style shootings occurred in Washington DC, leaving 10 dead.

2003 (August): A laid-off worker shot and killed six of his former workmates in Chicago.

2004 (November): A hunter killed six other hunters and wounded two others after an argument with them in Birchwood, Wisconsin.

2005 (March): A man opened fire at a church service in Brookfield, Wisconsin, killing seven people.

2006 (October): A truck driver killed five schoolgirls and seriously wounded six others in a school in Nickel Mines, Pennsylvania before taking his own life.

2007 (April): A student, Seung-Hui Cho, shot and killed 32 people and wounded 15 others at Virginia Tech in Blacksburg, Virginia, before shooting himself, making it the deadliest mass shooting in the United States after 2000.

2007 (August): Three Delaware State University students were shot and killed in “execution style” by a 28-year-old and two 15-year-old boys. A fourth student was shot and stabbed.

2007 (September): A freshman student at Delaware State University shot and wounded two other students at a campus dining hall.

2007 (December): A 20-year-old man killed nine people and injured five others in a shopping center in Omaha, Nebraska.

2007 (December): A woman and her boyfriend shot dead six members of her family on Christmas Eve in Carnation, Washington.

2008 (February): A shooter who is still at large tied up and shot six women at a suburban clothing store in Chicago, leaving five of them dead and the remaining one injured.

2008 (February): A man opened fire in a lecture hall at Northern Illinois University in DeKalb, Illinois, killing five students and wounding 16 others before laying down his weapon and surrendering.

2008 (July): A former student shot three people in a computer lab at South Mountain Community College, Phoenix, Arizona.

2008 (September): A mentally ill man who was released from jail one month earlier shot eight people in Alger, Washington, leaving six of them dead and the rest two wounded.

2008 (October): Several men in a car drove up to a dormitory at the University of Central Arkansas and opened fire, killing two students and injuring a third person.

2008 (December): A man dressed in a Santa Claus suit opened fire at a family Christmas party in Covina, California, then set fire on the house and killed himself. Police later found nine people dead in the debris of the house.

2009 (March): A 28-year-old laid-off worker opened fire while driving a car through several towns in Alabama, killing 10 people.

2009 (March): A heavily-armed gunman shot dead eight people, many of them elderly and sick people, in a private-owned nursing home in North Carolina.

2009 (March): Six people were shot dead in a high-grade apartment building in Santa Clara, California.

2009 (April): An 18-year-old former student followed a pizza deliveryman into his old dormitory, and shot the deliveryman, a dorm monitor, and himself at Hampton University, Virginia.

2009 (April): A man shot dead 13 people at a civic center in Binghamton, New York.

2009 (July): Six people, including one student, were shot in a drive-by shooting at a community rally on the campus of Texas Southern University, Houston.

2009 (November): U.S. army psychologist Major Nidal Hasan opened fire at a military base in Fort Hood, Texas, leaving 13 dead and 42 others wounded.

2010 (February): A professor opened fire 50 minutes into at a Biological Sciences Department faculty meeting at the University of Alabama, killing three colleagues and wounding three others.

2011 (January): A gunman opened fire at a public gathering outside a grocery in Tuscon, Arizona, killing six people including a nine-year-old girl and wounding at least 12 others. Congresswoman Gabrielle Giffords was severely injured with a gunshot to the head.