Girl critical after Colorado high school 'revenge' shooting

The teen gunman who shot himself dead after critically wounding a fellow student at their suburban Denver high school legally purchased the shotgun and ammunition he used in Friday's rampage at Arapahoe High School, according to Sheriff Grayson Robinson.

A vigil being held in Arapahoe for 18-year-old Claire Davis, who was critically injured in the school shooting.

The attack by Karl Pierson, 18, lasted less than a minute and a half, the sheriff said.

The gunman in yesterday's shooting at a Colorado school is believed to have acted in retaliation for disciplinary action against him by the debate club coach, according to Reuters.

The student injured in the Denver high school shooting yesterday has been named as 17-year-old Claire Davis, and is currently still hospitalised in a critical condition, according to Reuters.

The student gunman from yesterday's Colorado high school shooting was armed with a shotgun and ammunition he bought legally this month, the county sheriff told Reuters.

The sheriff added that the gunman at Arapahoe High School was also carrying a machete and a rucksack with three Molotov cocktails.

Students and families were reunited in emotional scenes after the shooting at Arapahoe high school in Colorado.

A 15-year-old girl was in critical condition after the shooting, suspected to have been carried out by an 18-year-old, Karl Pierson, who police say apparently shot himself at the scene.

Karl Pierson, the 18-year-old who opened fire on a high school in Colorado "held strong political beliefs" according to his classmates.

After opening fire at Denver's Arapahoe High School in what the local county sheriff said was most likely a "revenge attack" on a teacher, the teenager fatally shot himself.

A 15-year-old girl was seriously injured in the attack, and two other students were wounded, but have since been released from hospital.

Read: Female student critical after school shooting

The gunman in the Colorado high school shooting has been identified by Arapahoe County Sheriff Grayson Robinson as 18-year-old Karl Pierson.

The gunman was found dead at the scene at Arapahoe High School in Denver.

Read: Police search school shooting suspect's home

The suspected shooter at Arapahoe High School may have been a student seeking revenge over a conflict with a teacher, Arapahoe County Sheriff Grayson Robinson said.

Sheriff Robinson said the identity of the gunman will not be released "until everything is confirmed".

Read: Female student critical after school shooting

A 15-year-old girl remains in a "critical"condition after being shot at a Arapahoe High School in Denver, Arapahoe County Sheriff Grayson Robinson told a news conference.

Two other students injured in the attack have been released from hospital.

Read: Family reunite with shooting school students in Denver

There were emotional scenes in Denver as students of Arapahoe High School, where two people were injured in shooting, were reunited with their loved ones.

The suspected gunman was found dead with an apparently self-inflicted gunshot wound at the scene.

Read: Two injured in Colorado high school shooting