ZUI this article from CNN:
A U.S. Navy submarine collided with a Navy amphibious ship Friday in the Strait of Hormuz, mildly injuring 15 sailors, according to the commander of the U.S. Fifth Fleet.
The submarine, the USS Hartford, collided with the USS New Orleans about 1 a.m. in the strait, which runs between Iran and the Arabian Peninsula. It is one of the busiest commercial routes for oil tankers.
Fifteen aboard the Hartford were injured but returned to duty, according to a news release.
ZUI also this article from the BBC:
The incident is being investigated and damage to both ships is being evaluated, a navy statement said.
The New Orleans' fuel tank was ruptured in the crash, causing a spill of 25,000 gallons (90,000 litres) of diesel.
No injuries were reported aboard the New Orleans, according to the statement from the Fifth Fleet, which is based in Bahrain.
The navy said both vessels were on regularly scheduled deployments to the region and conducting security operations.
"Both ships are currently operating under their own power," said the statement.
Update 1150 20 Mar: Navy Times has an article with further information here.
Update 1820 23 Mar: Joel, as usual, has further coverage, including links to various Navy photos of the two ships arriving in port.