As the first wave of reports of mysterious booms came in, Ryan Hansome immediately thought back to a few years ago. 

"I heard the first one around 4:50-4:55. I immediately thought of the Richmond Hills explosion several years ago," the Shelby County Emergency Management Director told Giant FM. 

The Richmond Hill explosion took place Nov. 10, 2012 in the Richmond Hill subdivision on the Southside of Indianapolis and caused two deaths and over $4 million in property damage. 

Hansome said reports of people hearing the explosions came from Rushville and Carthage as well as around Shelby County.  As of Monday morning, there was still no cause for the mysterious booms.  Hansome told Giant FM he was still waiting to hear back from several agencies.