Police say four men have been charged with operating a drug factory in Norwalk.

The arrests come after a lengthy investigation by the Special Services Division.

Police say while executing a search warrant at a home on Osborne Avenue, several people were caught packaging fentanyl and crack cocaine.

Samuel Branch, 25, Jermaine Joseph, 21, Javon Coleman, 22, and Dontae Scullark, 20,  are each facing a slew of drug charges.

Branch is also charged with criminal possession of a firearm and use of a machine gun.

Joseph is also charged with criminal possession of a firearm and stealing a firearm.

Police say they seized 534 grams of crack cocaine packaged for street level sale, 53 glassine folds of pure fentanyl packaged for street level sale, 61.8 grams of ecstasy pills, approximately 542 grams of marijuana packaged for street level sales, scales, cutting agents, drug paraphernalia, four quarter sticks of dynamite, a stolen .40 caliber loaded handgun with an extended magazine, and a fully automatic loaded 10-millimeter handgun.

The four men are due in court next month.