SEATTLE (AP) - A federal official says witnesses reported hearing unusual noises from a KOMO-TV news helicopter before it crashed Tuesday, killing two people on board and injuring a third on the ground.
The National Transportation Safety Board's Dennis Hogenson says investigators are examining all possibilities as they look for what caused the crash. He says witnesses also reported seeing the aircraft rotate before it hit the ground.
Hogenson says investigators are working to document the scene and clear the wreckage. A preliminary report is expected in five days, followed by a fuller report with a probable cause in up to a year.
Officials will be looking at mechanical, environmental, pilot and other issues as they investigate the crash.