Local officials, police and fire are investigating reports of percussion, tremors and booms in Old Mystic.

According to First Selectman Ed Haberek, there is no evidence or cause as of yet, he said. Homeland Security has been notified, he said. Haberek said He hopes to have more information within the next hour.

Facebook reports and messages to Stonington Patch indicate people on the Stonington side of Old Mystic had their houses rocked, heard large boom sounds and felt as if perhaps there was an explosion nearby. Police and fire have not determined any cause as of yet. Check back with Patch later for details.