AUGUSTA — A 52-year-old Windsor man suffered a bad head injury on Sunday afternoon after riding a snowmobile across Togus Pond and striking a low bridge.

The man, who wasn’t wearing a helmet, hit his head on the bridge and suffered a “serious” injury that was “potentially” life-threatening,” said District Game Warden Robert Decker.

Decker declined to identify the man, who was brought to MaineGeneral Medical Center.

The man was riding his snowmobile near Hayden Road when he struck the bridge, which connects the mainland to an island in Togus Pond and is about 2.5 feet high, Decker said.

He was traveling with other people, but none of the other riders saw the accident, which happened around 3:10 p.m., Decker said.

Decker urged all snowmobilers to wear a helmet, which he said “probably would have prevented serious injury” in this case.

He also said that there was lots of open water on Togus Pond on Sunday, and that with rain in the forecast, people should be very careful if they’re thinking about riding a snowmobile in the coming days.