Police in Richmond, California, on Sunday arrested William Celli, days after receiving a tip that the 55-year-old was allegedly building homemade explosives with the intent of targeting the local Muslim community.

Shortly after the arrest, San Francisco's KPIX reported that police evacuated an area around Celli's home while the bomb squad investigated the interior. Officers removed at least one suspicious device from the property and detonated it before allowing neighbors to return to their homes. Police haven't clarified whether the object was actually an explosive, or whether it would have been ready for use if it was.

A spokesman for the Richmond Police Department confirmed to The Huffington Post that Celli was booked into Contra Costa County jail on charges of possessing an explosive device and making criminal threats.