Over 10,000 US troops are enforcing the Iran blockade, but no ships boarded so far, military says

Chairman of the Joint Chiefs of Staff Gen. Dan Caine speaks to members of the media during a press briefing at the Pentagon, Thursday, April 16, 2026 in Washington. (AP Photo/Kevin Wolf)

More than 10,000 American troops are helping enforce the blockade on Iranian ports, and while no ships have yet been boarded, the U.S. military said Thursday that it is warning Iran-linked ships that it could fire warning shots or escalate to other force if they try to outrun the Navy.

In the first three days of the military action, 14 ships have turned around rather than confront the naval blockade, according to U.S. Central Command, which oversees the Iran war.

Some Iran-linked or sanctioned vessels that have left the Persian Gulf through the Strait of Hormuz, the crucial waterway for energy shipments, have appeared to halt their movements, turn off their radio transponders or head back toward Iran’s coast, shipping data firms say.