Romania declared a Russian diplomat persona non grata on May 29, 2026 [1], after a drone struck a Romanian border town [1].

The expulsion signals a sharp escalation in diplomatic tensions between Bucharest and Moscow. It underscores the growing volatility along NATO's eastern flank as Russian military activity increasingly threatens non-combatant territories.

President Nicușor Dan ordered the diplomat's removal in direct response to the drone incident [1]. The Romanian government viewed the strike as an act of Russian aggression. By designating the official as persona non grata, Romania aims to signal its outrage over the violation of its national sovereignty [1].

Ukrainian President Volodymyr Zelenskyy said that Ukraine is ‘ready to support Romania’ [1]. The strike occurred in a border town, though specific details regarding casualties or structural damage were not immediately detailed in the reports [1].

Other regional leaders have called for a stronger collective response. Petr Pavel said the alliance must "show its teeth" [1]. This sentiment reflects a broader concern among European leaders that Russian incursions into NATO airspace or territory may go unanswered if the response remains purely diplomatic.

Romania has not specified the identity of the expelled diplomat [1]. The move follows a pattern of reciprocal expulsions seen across Europe during the ongoing conflict in Ukraine, but the direct physical impact of a drone strike on Romanian soil marks a significant shift in the nature of the confrontation [1].

Ukraine is ‘ready to support Romania’

The transition from diplomatic disputes to physical strikes on NATO member territory increases the risk of accidental or intentional military escalation. By expelling a diplomat, Romania is utilizing a standard diplomatic tool to respond to a kinetic event, attempting to balance a firm sovereign stance with a desire to avoid full military engagement.