A 26-year-old Ottawa man is dead after his snowmobile crashed near Sullivan Road in South Dundas Township Tuesday afternoon, according to Ontario Provincial Police.

Police say two snowmobiles were travelling together around 1 p.m. when both vehicles hit a ditch.

One of the drivers, 26-year-old Justin Petersen, was pronounced dead at the scene.

His uncle, Steven Petersen, was killed in a snowmobile crash last year near Pembroke.

OPP officers say the other driver, only identified as a 36-year-old man from Manotick, was taken to hospital with non-life threatening injuries.

Collision investigators are still trying to figure out what happened.