Colusa County sheriff's deputies and Sacramento River Fire Division personnel discovered the bodies after they responded to a report around 1:15 p.m. that a helicopter had gone down near a highway in the small town of Colusa, about 70 miles northwest of Sacramento, the sheriff's said in a statement, NBC News reported.
The US National Transportation Safety Board, which is investigating the crash with the Federal Aviation Administration, said the helicopter was a Robinson R66. Robinson Helicopter Co. described the R66 as a five-seat turbine helicopter powered by a Rolls-Royce turboshaft engine.
No further details were immediately available.