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GREEN BAY, Wis. — A Wisconsin marathon was halted Sunday after several runners and walkers experienced heat-related problems and required medical attention.

Cellcom Green Bay Marathon director Sean Ryan told the Associated Press officials knew temperatures would climb when the race started at 7 a.m. but hoped a combination of wind, medical resources, ice and water stops would help keep problems in check.

The race was shut down at 9:35 a.m. A total of 7,411 people started the marathon and half-marathon, and 49 percent finished before the race was stopped, most of them in the half-marathon.

From wire dispatches and staff reports