Update —. Attacker killed outside Israeli embassy in Belgrade An attacker carrying two knives attacked a Serbian gendarmerie officer guarding the embassy shortly after midnight. The policeman suffered a cut to the cheek and shot dead the attacker. Prosecutors say the officer acted in self-defense. The acting interior minister, Ivic Dacic, says the attacker is considered a minor and is being monitored as a supporter of the Islamic State. His identity has not yet been confirmed. Serbia raised its terror threat level to the highest level and increased security at key sites. The Israeli Foreign Ministry stated that the embassy was closed at the time and no embassy staff were injured. The investigation continues. Government of Serbia Prosecutors' findings Israel's response. The leading Balkan news channel in English.