The USS Fitzgerald and a Philippine-flagged container ship collided south of Tokyo Bay early on Saturday. The cause of the collision in clear weather is not known.

US Navy confirms 7 died in USS Fitzgerald collision off Japan

The USS Fitzgerald and a Philippine-flagged container ship collided south of Tokyo Bay. The cause of the collision in clear weather is not known.

The damage of the right side of the USS Fitzgerald is seen off Shimoda

A significant portion of the crew was asleep when the collision occurred, tearing a gash under the warship's waterline and flooding two crew compartments, the radio room and the auxiliary machine room.

the damage of Philippine-registered container ship ACX Crystal

A large dent was clearly visible in its right mid-section as the destroyer limped back to Yokosuka naval base south of Tokyo, home of the Seventh fleet

The USS Fitzgerald heads to Yokosuka

Two of three injured crew members who were evacuated from the ship by helicopter, including the ship's commanding officer, Commander Bryce Benson, were released from the U.S. Naval Hospital in Yokosuka

the damaged USS Fitzgerald is seen off Yokosuka

Multiple U.S. and Japanese investigations are under way on how a ship as large as the container could collide with the smaller warship in clear weather.

an injured USS Fitzgerald personnel is carried by U.S. military personnel

Vice Admiral Joseph P. Aucoin, the Seventh Fleet commander, was asked on Sunday if damage on the starboard side indicated the U.S. ship could have been at fault, but he declined to speculate on the cause of the collision. 