TROY, Mich. (AP) — Four people have been charged in the death of a 5-year-old boy who was “incinerated” inside a pressurized oxygen chamber that exploded at a suburban Detroit medical facility, Michigan’s attorney general said Tuesday.

Thomas Cooper from Royal Oak, Michigan, was pronounced dead at the scene Jan. 31 at the Oxford Center in Troy. His mother suffered burn wounds while trying to save her boy.

LINCOLN — One of Nebraska Gov. Jim Pillen’s priorities advanced to the second round of debate with a vote on Monday, as a statewide cell phone ban in schools inched closer to becoming law.