Mount Washington says it is mourning a staff member who was killed in a rollover crash near the ski resort late Monday night.

North Island Traffic Services says the crash happened just before midnight on the Mount Washington Parkway near Nordic Drive.

A pickup truck with three people inside was heading down from the mountain when it rolled over, killing a man in his 30s at the scene.

Another man and a woman who sustained minor injuries were sent to hospital for treatment and have since been released.

Investigators say speed was likely a factor, and believe the driver was not wearing a seatbelt.

Mount Washington confirmed that the crash involved staff members who were not recently on-shift.

"Our resort family is grieving over the loss of our member after last night's tragedy. Our thoughts are with the family and friends and our staff members - we are deeply saddened by this loss," said Mount Washington spokesperson Sheila Rivers.

An investigation into the crash is ongoing.