Hydro One says four of its employees have been killed in a helicopter crash north of Kingston.
Provincial police say the crash occurred about noon in Tweed.
Homeowner Kim Clayton says hydro crews had been working on her property for weeks and she was used to hearing them fly back and forth.
She says the loud crash shook her house, sending her to a window, where she says she saw part of the chopper in the trees in the distance by an open field.
Hydro One is expressing its condolences to the loved ones of those killed.
It says names will not be released as next of kin are being notified.
The Tweed fire department confirmed it was on the scene of the crash.
Ontario’s air ambulance service responded to the scene but said it did not transport any patients.
A spokesman for the Transportation Safety Board said a team of investigators was en route to the crash site and was expected to arrive by late afternoon.