FOLSOM, Calif. -- The father of a Folsom elementary school student was arrested on suspicion of possessing a loaded firearm while driving his 4-year-old son to school.

Leo Duane Warner, 42 of Mather, was taken into custody without incident and booked into county jail in downtown Sacramento, Sgt. Eric Heichlinger said in a news release.

Folsom police investigators were notified by staff at the Folsom Hills Elementary School that they believed Warner was in possession of a handgun while dropping off and picking up his son.

Officers on Thursday morning contacted Warner in his vehicle in the 100 block of Manseau Drive, in front of Elvie Parrazo Briggs Park and about a half-mile from the school.

A loaded .9 mm handgun was found in a pocket behind the front passenger seat, within the reach of the 4-year-old boy.

Shortly after noon, Warner was arrested. Warner's 2-year-old daughter was also in the vehicle.

None of the students at the school were in danger and there is nothing to indicate that Warner had any ill intent towards the students or school staff, Heichlinger added.

Warner was booked on charges of possessing a loaded firearm within a vehicle, felony child endangerment, possession a firearm on a school campus and storage of a firearm accessible to children.

A report of this investigation will be forwarded to Sacramento County Child Protective Services.

At Warner's request, the children were released at the scene into the custody of their maternal uncle.