Police arrested a man in connection to a series of explosions in upper Bucks County.

David Surman Jr. was taken into police custody after local police and the FBI connected him to more than 20 explosions.

After searching his home and business, authorities found more explosive devices, including a weapon of mass weapon. Police also found methamphetamine and drug paraphernalia. Drawings of swastikas and other hateful messages were found in Surman Jr’s home.

A doctored image of Surman Jr. and his girlfriend driving away from the scene of an explosion was also recovered from the suspect’s home. Surman Jr’s girlfriend was questioned by police but is not believed to be involved with the bombings.

Surman Jr. is the owner Consolidated Chemical and Solvent Company, a chemical manufacturer in Bucks County. Investigators performed a series of test explosions outside of the chemical manufacturer.

Investigators have been searching for the source of the blasts for several months now. Residents of upper Bucks County and lower have been reporting mysterious explosions to police since early April. Each explosion occurred between 1 a.m. and 3:30 a.m.

There have been no reported injuries in the explosions. Investigators are concerned there could still be planted explosive devices and warned residents of those counties to be cautious.

Surman Jr. was charged with recklessly endangering other people, possession of offensive weapons, possession of instruments of crime, passion of a controlled substance, possession of drug paraphernalia, and weapons of mass destruction. The suspect is being held at $750,000 bail and is scheduled to appear at a preliminary court hearing on July 10.

WBCB’s Katie Donahue contributed to this report.