Rochester's evening took an unexpected turn Monday as outdoor sirens blared for 20 minutes, causing confusion before officials shut them down and began an investigation into the cause.

Minnesota residents who are outside celebrating the Fourth of July should not be alarmed if they hear warning sirens sound at 1 p.m. The first Wednesday of the month is a designated day for most ...

The sirens that went off were located in northeast and southeast Rochester and as far east as Chester Woods Park.