A knife-wielding assailant attacked a Serbian police officer guarding the Israeli Embassy in Belgrade overnight Wednesday, slightly wounding the guard before being shot dead by him. Serbian Interior Minister Ivica Dacic identified the attacker as a minor from the western town of Sabac who had been monitored by security agencies as an IS supporter. Dacic said the assailant shouted "Allahu Akbar" during the attack and had kept an IS black flag on his Instagram account. Police are treating the incident as a terrorist attack and have raised Serbia's terrorism threat level to its maximum — "red alert" — meaning tighter security checks and increased police presence at sensitive sites, infrastructure facilities, and places where large crowds gather. Israel's Foreign Ministry confirmed an "attempted terrorist attack" near its embassy in Belgrade and stated no embassy personnel were injured. The incident is under investigation. This is the second attack on the same embassy in under a year. In June 2024, a 25-year-old Islamic convert from a village near Belgrade seriously wounded a police officer guarding the Israeli Embassy with a crossbow before being killed by police. That attacker had also been identified as radicalized. The pattern — lone-actor, low-tech, same target, IS-linked ideology — points to a persistent vulnerability in Serbia's counterterrorism posture despite active monitoring. The timing is politically charged. The attack came days after key early parliamentary elections in Serbia and one day after Israel held its own parliamentary vote, with no clear result yet in sight. Whether the timing was deliberate or coincidental, it injects security anxiety into an already volatile political moment in both countries. Serbia's response — maximum alert, blanket security escalation — is the standard playbook for lone-actor attacks on diplomatic targets. The harder question is why monitoring by security agencies failed to prevent an attack by a subject already flagged as an IS sympathizer. Being on a watchlist and still reaching an embassy with a knife is a concrete intelligence failure, however minor the physical outcome. The broader signal is about soft-target diplomacy in the Balkans. Israeli embassies globally face elevated threat levels, but Belgrade has now produced two near-identical incidents at the same location within twelve months. That recurrence is the story — not the individual attack, but the system that permits repetition.