Swirling ice disc causes a stir in Maine

A handful of dog walkers and onlookers stopped to gaze at the curious ice formation on a chilly Thursday morning around dawn

A large ice disc slowly rotates in the Presumpscot River in Westbrook, Maine (Robert F Bukaty/AP)

A swirling disc of ice on a river in the US state of Maine is drawing onlookers in the heart of winter once again.

The disc has formed in the Presumpscot River in Westbrook.