One person has died and another has critical injuries after a tree fell on a car in Bulls during a forestry operation.

A St John spokeswoman said ambulance staff were called to a rural property in Pukehou Rd at 2.15pm on Monday.

One person died and a person with critical injuries was flown to Palmerston North Hospital.

A third person has serious injuries.

A police spokeswoman said the accident happened on private property in the Manawatu town during a forestry operation.

A Fire and Emergency NZ shift manager said firefighters were called to the scene to get people out of the vehicle.

WorkSafe NZ has been advised and police inquiries are continuing.

More to come.