CLINTON, Maine (AP) — Maine police say four people were injured when a horse-drawn wagon struck a vehicle and a telephone pole.

Officer Phil DiLuca of the Clinton Police Department says the "freak accident" happened Sunday when a loud noise spooked the two horses, causing the driver to lose control.

The Portland Press Herald reports one person with critical injuries was flown by helicopter to a hospital while the other three passengers were treated for less serious injuries at nearby hospitals.

The accident remains under investigation by Clinton police and the Kennebec County Sherriff's Office.

(Information from: Portland Press Herald, http://www.pressherald.com)