HORICON  Four people were arrested early Friday after State Police found two sophisticated marijuana growing operations in neighboring homes on Johnson Road in the hamlet of Adirondack, authorities said.

In all, 340 pot plants, a loaded, unregistered handgun and more than $10,000 in cash was seized during simultaneous raids at 112 Johnson Road and 136 Johnson Road.

Police charged two brothers with possession of 300 or so plants that were found growing in a barn at 136 Johnson, and a married couple at the neighboring home who had 40 or so, authorities said.

Specialized lights and other equipment such as ventilation and carbon dioxide tanks were being used to help the plants, and the duo had machinery to manufacture concentrated cannabis, also known as hashish.

Charged with first-degree criminal possession of marijuana, a felony, in connection with the bigger operation were Tyler Monahan, 24, and Riley Monahan, 19, police said. They also face misdemeanor counts of seventh-degree criminal possession of a controlled substance for hashish possession and unlawful growing of cannabis, according to State Police.