An unknown man armed with two knives attacked a police officer guarding the Israeli embassy in Belgrade, Serbia, local media reported. The event lasted 15 minutes during the night. The law enforcement officer neutralized the attacker in self-defense but suffered a cut to his face. The attacker may have been a minor, according to reports from the Serbian city of Šabac. His identity is established. According to Serbian Interior Minister Ivic Dacic, the perpetrator may have been a supporter of the Islamic State. Following the incident, threat level in Serbia was raised to the highest level, red. Police presence will be increased in infrastructure facilities and places of mass gatherings.