UPDATED 01/26/11 12:29 p.m.

DES PLAINES, Ill. (CBS) — A meth lab in Des Plaines prompted a hazardous materials situation overnight.

At 7:36 p.m. Tuesday, police found suspicious items in a house at 327 S. Oxford Rd., according to release from police.

A Level III hazardous materials situation was enacted.

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When officers determined the items were consistent with the production of volatile chemicals, a hazmat team went to the scene, according to the release.

Police were in the area conducting an undercover drug investigation, Chief Jim Prandini said. What they found in the basement “was a working, active meth lab,” he said.

Police were questioning two people in connection to the raid, the Chicago Tribune reported.

The Sun-Times Media Wire contributed to this report.