A U.S. Navy guided-missile destroyer collided with a Japanese-owned merchant vessel near the Strait of Hormuz this morning, with no injuries reported on either vessel. The USS Porter collided with the Panamanian-flagged bulk oil tanker M/V Otowasan at about 1 a.m. local time Sunday , according to the statement by the Bahrain-based Fifth fleet posted on its website.

The navy said the incident, which was not related to combat, is under investigation. Damage to the USS Porter was being evaluated, but the ship is able to operate under its own power. USS Porter is on a scheduled deployment to the U.S. b of responsibility conducting maritime security operations and theater security cooperation efforts, the statement said. The Strait of Hormuz, at the entrance to the Gulf, is the export route for one-third of global seaborne traded oil.