A defense official said the man, 21, was turned down for military service after failing a psychological test. Investigators are asking how he passed another such test to obtain a gun permit.

Nine students were killed — six girls and three boys aged between 14 and 17, one with Polish citizenship — as well as a teacher, police said. Another 11 people were wounded.

At least eight people have been killed in a school shooting in the Austrian city of Graz, according to reports. Austrian police confirmed that a major operation was underway in the city on Tuesday morning. The operation began at 10am after gunshots were heard inside the school, police said.