A nuclear-powered U.S. attack submarine struck a suspected fishing vessel after traversing the Strait of Hormuz on Jan. 10, damaging one of the submarine's periscopes and injuring no one, a Navy official said, Reuters reported. The Navy's Fifth Fleet said in a statement the vessel appeared unaware of the incident, saying it "continued on a consistent course and speed offering no indication of distress or acknowledgment of a collision." The incident took place at 5 a.m. local time and is under investigation. It follows an August collision between a U.S. guided missile destroyer and an oil tanker. The Pentagon more than doubled the number of minesweeping assets deployed in the U.S. 5th Fleet area of responsibility last fall.