Firefighters were called about 8 a.m. Tuesday to McCollum Laboratories on Kansas University's West Campus following reports of smoke in the building.
Kansas University spokesman Jack Martin said the smoke was caused by a belt in an air handling unit. The building had re-opened as of 9 a.m., Martin said.
Martin said that no injuries were reported, and the only expected damage is to the belt involved.
A hazardous materials team also was called to the lab, as a precaution.
The building is just west of the intersection of 21st and Iowa streets.
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