Leavenworth ? A Leavenworth man was arrested after authorities said they found explosives, potential bomb-making chemicals and a homemade grenade launcher in his booby-trapped house Friday.

Leavenworth police served a search warrant on the home of the 51-year-old man after an investigation led them to believe he was manufacturing explosive devices, Maj. Pat Kitchens said.

Kitchens said the search was slowed when investigators found two apparent booby traps, including an inactive spring-loaded device that could trigger a shotgun.

Police have not released the name of the man that was taken into custody about 1:30 p.m. Friday. He remained in Leavenworth County Jail on Saturday and charges are expected to be filed Monday.

When they were done searching, police said they had found 11 pipe bombs in a metal garden shed behind the house, rifles and handguns, 43 pounds of black powder and a homemade grenade launcher.

Also, police said, they found a stash of chemicals — potassium chloride, sulfur, charcoal powder and potassium nitrate — and manuals covering topics including the manufacture of improvised land mines.

The man’s wife and child were staying elsewhere Friday night, Kitchens said.

Kitchens would not elaborate on what brought the man and the house to their attention.