Graz

The Graz shooter, named by Austrian media as Arthur A, has been described by police as a very introverted person, who had retreated to the virtual world.

Police in the city of Graz also found a non-functional pipe bomb, and a "farewell" letter and video during the search, they said in a statement.

One woman, Tores, told BBC News in Graz's main square on Wednesday that she knew one of the boys who had died.

The Graz gunman is understood to have owned both firearms legally, and he had no criminal record.

She told BBC News "everybody knows somebody" at the school because Graz - despite being the second-largest city in Austria - is "not that big".