Wardens say two people were killed in separate snowmobile accidents over the weekend.

The first accident occurred just after 3:30 Saturday afternoon on Pennesseewassee Lake in Norway. A snowmobile driven by 52-year-old Gracie Herrick Onofrio of Norway struck a snowbank while traveling on a plowed road on the lake. The sled went airborne and Onofrio was thrown off and then struck by another snowmobile traveling with her. She was pronounced dead at the scene.

The second accident happened Saturday evening just before 11:00 on Thompson Lake in Poland. Two snowmobiles were traveling on a plowed portion of the lake, in the area known as The Heath. The lead sled, operated by 17-year-old Troy Marden of Amesbury, Massachusetts, failed to negotiate a corner in the road and struck a snowbank. Marden was ejected from the snowmobile. An operator who was with Marden attempted to render aid before going for help, but he was pronounced dead at the scene.

These are the fourth and fifth snowmobile fatalities of the season. Both incidents remain under investigation.