Troy police say Tamela Peterson ran away when asked for her cellphone after Thomas Cooper died in a hyperbaric chamber fire at the Oxford Center.

Michigan Attorney General Dana Nessel has charged four people in connection with the death of a 5-year-old boy who was killed in a hyperbaric chamber explosion in Troy, Michigan.The four were arrested Monday morning and arraigned Tuesday afternoon.

Two other people were arrested Monday and also are expected to be arraigned in the child's death, police said.