RIO DELL — Law enforcement officials in Humboldt County say they called in a bomb squad after finding inert grenades and weapons near a Northern California marijuana grow.

The Times-Standard of Eureka reports ( ) the Humboldt County Drug Task Force called in a bomb squad on Tuesday to investigate a marijuana grow behind the former Eel River Sawmill, north of Rio Dell.

Officials say one wing of the building had been converted into an indoor marijuana grow where they found 576 plants, two grenades and six firearms and $5,800 in cash. Officials say three people were arrested in the raid Tuesday morning at the defunct sawmill.

Beth Hendry and Nathan Titchener, both 28, as well as 21-year-old Ben Titchener were taken into custody at the scene. Their hometowns were not immediately available.