United Nations Secretary-General Antonio Guterres said that recent military exchanges between Iran and the U.S. could lead to a return to "full war."

The warning comes as the Middle East faces renewed instability, threatening to dismantle diplomatic efforts and a fragile peace that had held for several months.

The escalation followed an exchange of strikes between Iran and the U.S. after a U.S. helicopter was downed. This military activity has prompted neighboring countries to heighten their security posture, including Kuwait and Bahrain, which activated their air defenses.

Guterres said the risk of a full-scale conflict is now critical. The current tension threatens to break a cease-fire that had been in place since April [1].

The U.S. has declared its strikes against Iran complete, but the UN chief remains concerned about the cycle of retaliation. The volatility in the region remains high as operational areas for U.S. forces and Iranian interests continue to clash.

International observers are monitoring whether the activation of air defenses in the Gulf will deter further strikes or signal a broader regional mobilization. The UN is calling for immediate restraint to prevent the collapse of the previous agreement.

Antonio Guterres said that recent military exchanges between Iran and the U.S. could lead to a return to "full war."

The collapse of a cease-fire established in April suggests that tactical military engagements, such as the downing of a helicopter, can quickly override strategic diplomatic agreements. The activation of air defenses in Kuwait and Bahrain indicates that the conflict is no longer contained to a bilateral exchange but is impacting the security infrastructure of the wider Gulf region.