Crews are searching the Chippewa River in Eau Claire for two men seen hanging on to a canoe in the water.

Authorities were called to the river at 1:40 p.m. Tuesday. An Eau Claire police spokesman says a kayaker saw two men in the river hanging on to a capsized silver canoe.

The two men are believed to be in their 20s. The kayaker tried unsuccessfully to throw a rope to the men and overturned into the river, but managed to get to the river bank without injury.

The Leader-Telegram reports fire crews had boats in the water, searching for the canoeists.

A Mayo Two medical helicopter joined the search by air for about an hour.

By late Tuesday afternoon, neither the canoe nor the two men were located.