MILWAUKEE (CBS 58) -- Police are investigating a bomb threat to Milwaukee's City Hall Tuesday evening, Aug. 22.

According to the mayor's spokesperson, the threat "included vague locations and city hall specifically."

Records show police were dispatched just before 8 p.m.

The police department says officers and police K-9s searched the area and did not locate any people or objects. 

An investigation is ongoing. 

Anyone with information is asked to contact Milwaukee police at 414-935-7360, or to remain anonymous, call Crime Stoppers at 414-224-TIPS.