Northbound Broadway was closed near Maumee Avenue for most of the day Thursday while hazardous materials crews inspected chemicals inside a former medical laboratory.

Toledo-Lucas County Health Department spokesman Stacy DeBruyne said there was no threat to public health and no one was evacuated. She also said there was no criminal activity involved.

The fire department was called to the warehouse at 1021 Broadway just after 9 a.m. The street reopened about 7:20 p.m.

Ms. DeBruyne said city inspectors checked the building, formerly occupied by Advanced Clinical Diagnostics laboratory, earlier this week after Toledo's Neighborhoods Department received complaints from the community. During the inspection, chemicals were found inside.

The health department obtained a search warrant to enter the structure.

"We know that there's chemicals inside," Ms. DeBruyne said. "The nature of them we're not sure, and that's why we've involved hazmat [crews]."

First Published June 1, 2012, 4:00 a.m.