FAIRFIELD - A Fairfield man is in the hospital this evening after he appeared out of sorts when police searched his home on Tuesday and found a cache of dangerous materials.

Police took Joseph Callahan into custody after they found a massive stockpile of guns, ammunition and explosives inside his residence.

Police say they expect to arrest Callahan on explosives-related charges after he is released from the hospital.

Authorities say they discovered the cache after the 65-year-old man reported someone had broken into his home on Bronson Road on Tuesday. They came across between 150 and 200 guns, as well as tens of thousands of ammunition rounds and homemade bombs.

An official from the police department says most of the weapons appear to be legal themselves.

Officials with the FBI, Fairfield County Hazmat Team and local bomb squads responded to the scene, and forced nearby residents to evacuate.

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The suspect was taken for a mental evaluation. Detectives say he has a background in chemistry and worked for years at Remington Arms.

Investigators say the process of removing the items from the home could take several days.

For more on the discovery, watch the clip to the left or click News 12 Extra on Optimum TV channel 612.