Iran attacks on US forces more than 10 times since April 8 ceasefire, U.S. military says
U.S. military reports Iran attacks on US forces over 10 times since April 8 ceasefire, stranding ships and prompting expanded security in the Strait of Hormuz.
The U.S. Joint Chiefs of Staff chairman told reporters on Tuesday that Iran has carried out more than 10 attacks on US forces since a ceasefire took effect on April 8, 2026.
Those “Iran attacks on US forces” have included strikes on military targets and repeated actions against commercial vessels, the official said.
The developments prompted an expanded defensive posture in the southern Strait of Hormuz as Washington works to restore safe passage for maritime traffic.
U.S. military reports attacks since April 8 ceasefire
The senior U.S. military official said the incidents began after a ceasefire entered into force on April 8, 2026 and have continued intermittently.
Overall, the official reported that Iran has launched more than 10 separate attacks against U.S. personnel and assets during the nearly one-month period.
U.S. forces have so far categorized the incidents as below the threshold for a return to large-scale combat operations, but increasingly disruptive to operations in the region.
May 4 attacks targeted Oman and the United Arab Emirates
At the briefing the chairman said that on Monday, May 4, 2026, Iranian forces conducted one attack directed at Oman and three separate attacks against the United Arab Emirates.
Those incidents were part of a broader pattern that same day, which also included actions against commercial shipping in the Gulf.
Officials noted the timing and concentration of the strikes raised concerns about escalation and the safety of regional partners’ waters.
Impact on commercial shipping and stranded crews
U.S. officials estimate the incidents have left roughly 22,500 sailors aboard more than 1,550 commercial vessels effectively stranded in the Gulf.
Repeated harassment, reported gunfire and vessel seizures have caused merchant ships to delay transits and seek sanctuary, disrupting schedules and supply chains.
The U.S. military emphasized that protecting commercial navigation remains a central objective of its regional operations to minimize economic fallout.
Weapons and tactics used against U.S. units
The military official described a range of systems employed in the attacks, including cruise missiles, unmanned aerial systems and fast attack boats.
These platforms were used in coordinated actions against U.S. ships and aircraft conducting escort and escort-support missions through the Strait of Hormuz.
U.S. rotary-wing assets and other platforms have been used to counter and deter those threats, and commanders report a mixture of kinetic and non-kinetic responses to repel attacks.
Expanded security measures near southern Strait of Hormuz
U.S. forces have established a widened security zone in the southern sector of the Strait of Hormuz, close to Omani territorial waters, to shield maritime traffic.
Ground, naval and air units have been assigned to protect a corridor intended to restore safe passage and to deter further Iranian attacks on commercial shipping.
A senior Pentagon official characterized the defensive network as a strong and layered shield intended to reassure shippers and regional partners.
U.S. assessment of escalation risk and operational posture
Despite the repeated incidents, U.S. commanders maintain the activity so far remains short of prompting a full-scale resumption of combat operations.
Military leaders continue to monitor Iranian behavior and assess risk in real time while coordinating with allied and partner navies in the region.
Officials said the priority is to prevent further disruption to global trade while avoiding steps that could trigger broader conflict.
The U.S. military has stressed that continued harassment of commercial and naval traffic will be met with defensive measures designed to restore safe maritime transit, and it urged de-escalation through diplomatic channels alongside operational deterrence.