Sub hits Gulf vessel no injuries US navy

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A U.S. submarine's periscope struck a vessel in the Gulf on Thursday but apparently caused no major damage or injuries, the U.S. Navy's Fifth Fleet said in a statement.

The USS Jacksonville, a Los Angeles-class sub, "struck a vessel while operating in the Persian Gulf" at about 5 a.m. local time (0200 GMT), the statement said.

"Jacksonville then surfaced from periscope depth to ascertain if there was any damage to the unidentified vessel," it said.

"The vessel continued on a consistent course and speed offering no indication of distress or acknowledgment of a collision."

Damage to the submarine was limited to one of its two periscopes while the vessel's nuclear reactor "remains in a safe condition" along with the propulsion plant, according to the Bahrain-based Fifth Fleet.

A U.S. naval P-3 aircraft searched the area and spotted no debris in the water or vessels in distress, officials said.

Any maritime incident involving U.S. naval ships in the Gulf raises the possibility of a crisis, given tensions between Iran and the United States over Tehran's nuclear program.

Tehran has threatened to block oil tanker traffic through the strategic Strait of Hormuz in retaliation for international sanctions, imposed to push Iran to give up sensitive uranium enrichment work.