Kujtim Fejzulai believed to have acted alone but known to have been an Isis sympathiser
Austrian police are investigating whether an Islamist terrorist who killed four people in Vienna on Monday night was part of a wider network and if the attack could have been prevented.
Kujtim Fejzulai, known to authorities as a sympathiser of the Islamic State group, which claimed credit for the murders, is believed to have been the lone gunman in the attack despite hours of uncertainty over whether accomplices remained at large.
