Four Kuwaiti soldiers were injured in an Iranian airstrike on the emirate, according to a military source cited by Portuguese broadcaster RTP.
The attack involved a barrage of approximately 40 missiles and drones, which Kuwaiti defenses intercepted.
The incident marks a direct escalation of hostilities involving sovereign territory beyond the immediate US military footprint.
The strike occurs against the backdrop of a broad retaliatory campaign launched by Iran against US military assets in the Gulf region. U.S. Central Command previously confirmed that Iran had fired two ballistic missiles targeting American forces stationed in Kuwait, signaling a significant deterioration in regional security.
Sirens have sounded across multiple Middle Eastern countries in recent days as the conflict widens.
For energy markets, the direct targeting of Kuwait—a major OPEC producer and key transit hub—heightens the risk premium on crude oil.