Two seaplanes carrying tourists from the same cruise ship have collided in south-eastern Alaska, with at least four people dead and two missing.
One plane was carrying eleven people when it hit the other, which had five people onboard, near Ketchikan, the Associated Press reports.
Ten of those aboard the first plane survived and were taken to hospital.
Three of those killed were aboard the other aircraft, while it is unclear which plane carried the fourth victim.
Investigators from the National Transportation Safety Board (NTSB) in Washington DC are expected to arrive in Ketchikan later on Tuesday.
Both planes were from the Royal Princess cruise ship which was en route from the Canadian city of Vancouver to the Alaskan city of Anchorage.