Large quantities of mobile phone footage have confirmed that the jihadist who killed four people in a rampage in Vienna on Monday was the only gunman, but Austria fumbled intelligence on him, Interior Minister Karl Nehammer said on Wednesday. Austria arrested 14 people aged 18 to 28 on Tuesday in connection with the attack and is investigating them on suspicion of belonging to a terrorist organisation, he said. "Before the terror attack began, according to the information currently available, some things also went wrong," Nehammer told a news conference.