(Michigan City, IN) - A child prankster might think twice now about making another bomb threat.

Just before 11 a.m. yesterday, police responded to the Walmart in Michigan City on a report of a telephone caller who had indicated that a bomb had been placed inside the store.

Michigan City Police said no explosive device was found during a search, conducted after the store's prompt evacuation. 

The investigative division worked the entire afternoon to try and determine who placed the call, before eventually learning that a 13-year-old boy from Sarasota, Florida was the caller in question, and that he had placed similar calls to businesses in other communities in the area.

Further details have not yet been released, but Michigan City Police are working with authorities in Sarasota in the ongoing investigation.