Officials say the former student who killed nine students and a teacher at a school in Austria and then took his own life planned the attack in detail

ABC News Foreign Correspondent Tom Soufi Burridge reports from Graz, Austria.

Eleven people injured in a school shooting in Graz, Austria, on Tuesday are still being treated but are not in life-threatening condition, officials said.

Ten people were killed and several others injured in a shooting at a high school in Graz, Austria, the city's mayor said, adding that the alleged shooter is also dead.

A 14-year-old boy was fatally stabbed and four others were injured in a knife attack in Villach, Austria, on Saturday, according to police.

Officials say a Syrian man, 23, is charged with murder and attempted murder for stabbing and killing a 14-year-old and wounding five others in Villach, Austria.

Austrian Interior Minister Gerhard Karner said a third teenager has been arrested in connection with the foiled attack on now-canceled Taylor Swift concerts in Vienna.

Chemical substances and technical devices were found at the house of a 19-year-old Austrian suspected of planning an attack on upcoming Taylor Swift concerts in Vienna.

A major rescue operation with dog handlers and helicopters is underway after a large avalanche in Austria has reportedly buried several people.

Police say gunmen with rifles opened fire in six locations and at least one person was killed. Authorities say one gunman was shot and killed by police, but they are searching for at least one other.