Ten US Navy sailors are missing and five have been injured after a US destroyer and an oil tanker collided near Singapore, the Navy says.
The guided missile destroyer USS John S McCain was sailing east of Singapore and preparing to stop in the port when the collision with the Liberian-flagged vessel occurred.
A wide-ranging search and rescue operation is under way.
A Singapore Air Force helicopter transports wounded to hospital
It is the second collision involving a US Navy ship in recent months.
What do we know about the collision?
It was reported before dawn at 05:24 local time on Monday (21:24 GMT on Sunday) and took place east of the Strait of Singapore, as the USS John S McCain prepared to perform a routine port stop in Singapore.
Singapore and US authorities said the destroyer sustained damage to her port side, which is the left-hand side of the vessel facing forward.