A homemade bomb that authorities said had the potential to be "very effective" was found at the home of a 14-year-old boy who recently made threats against his school, officials said.

The Rose Hill High School student, whose name was not released, appeared in Sumner County Court Monday on a probation violation.

Officers searched the boy's home Friday on a tip from Wichita police and found a complete explosive device, Sumner County Sheriff Gerald Gilkey said. The bomb was dismantled at the scene.

Officers also found several component items and documents related to bomb manufacturing, Gilkey said.

In addition to a probation violation, the boy may face additional charges for criminal use of explosives and making a threat toward a school, Gilkey said. The sheriff said he didn't know why the boy was on probation.

Gilkey would not give details of the threats made against the school and said he did not know why the teen-ager was on probation.

The sheriff also would not describe the bomb or how it was made.

"I don't want to give anybody any ideas," Gilkey said. "It was a very simple design. But it would have been very effective."

Wellington is about 30 miles south of Wichita.