New York City Police arrested four people Saturday after discovering an extensive illegal weapons stash in a Brooklyn home located across from PS 216, a Gravesend elementary school.

On Friday, investigators reportedly seized 30 guns and an assortment of weapons that included an umbrella with a blade hidden in the handle, a machete and various knifes. The gun collection included handguns, shotguns, rifles, and even two assault rifles.

The four people living in the house, located at 2438 West Street, are: 30-year-old Vincent Siano, his mother Kathleen Siano, his father Thomas Siano, and a friend, 27-year-old Michael Poole.

The four were arrested on charges of illegal weapons possession, but authorities also found a large quantity of pills, along with materials to make homemade ammunition, and the investigation is ongoing.