Vienna shooting: 'I thought it was fireworks... then I saw a gunman'
Austrian police are searching for suspects after four people were killed in a multiple gun attack in the capital, Vienna.
One attacker – described by Interior Minister Karl Nehammer as an "Islamist terrorist" – was shot dead by police, officials said.
Eyewitness Rabbi Schlomo Hofmeister says he originally mistook the attack for the sound of fireworks.