4:50 PM PT -- Law enforcement sources tell us that authorities did NOT find an explosive device at the daycare center.

4:15 PM PT -- Chicago PD just confirmed the details of the bomb scare to TMZ ... saying multiple calls came in Saturday reporting a bomb threat, adding that the daycare center was evacuated. Luckily, no one was injured ... but cops are still investigating.

The woman who paid for R. Kelly's bail got a bomb threat at a business she reportedly owns ... which just so happens to be a daycare.

Multiple people called in a bomb threat Saturday at a local daycare center ... according to WBBM reporter Brad Edwards, who first reported the story. Valencia P. Love has direct ties to the biz, and some reports say she's the owner.

Edwards goes on to report that Chicago PD doesn't have anyone in custody and that the local bomb and arson squads cleared the scene. Cops are currently investigating the bomb threat.

Love is reportedly still listed as a "registered agent" of the daycare center -- but according to local outlets, the daycare itself and the Dept. of Children and Family Services says Love no longer works there.

You'll recall ... Love posted the $100k bond R. Kelly needed to get out jail in Chicago last week. She also posted a lengthy statement afterward, saying R. Kelly wasn't a monster ... and that she was inclined to believe he's innocent of the charges he's facing.

The bomb threat would appear to have been made by someone pissed at Love for supporting Kelly.

Still, it's reminiscent of the shooting threat that was called in just a few months ago during the NYC screening of "Surviving R. Kelly." Law enforcement sources told TMZ ... the NYPD was looking into someone with a Chicago area code as a person of interest.

R. Kelly's ex-wife, Andrea Kelly, told Variety that she believed R. Kelly was connected to that threat.