She entered the school about 4:45 p.m. when classes were not in session.
The Redford Township Police Department said in a statement Tuesday that the explosion was caused by a "fuel oxygen mixture."
Authorities investigating a Redford house explosion believe propane used to heat the home may be the cause.
While out on bond, Nederveld was arrested this week in Redford Township.
A 19-year-old man is in custody for allegedly making a threat against Redford Union High School, police said.
A candlelight vigil was held Friday night for the Redford woman who was discovered Monday gruesomely stabbed and mutilated.
A 44-year-old Redford man is accused of killing a woman he was living with and mutilating her body.
A 44-year-old man is in custody in connection with the discovery of a woman's body in a Redford Township apartment.
The man was described as black, older and bearded.
He was bound over for trial and was being transferred from 17th District Court to the Redford Township jail when he fled on foot across 5 Mile Road.
The man was due in court for an armed robbery charge as a habitual offender.
A 25-year-old Redford Township man has been charged with breaking into his neighbor's home.
Police are searching for two gunmen who opened fire on a vehicle.
The pair then posted the video on the victim's Facebook page and their own pages, too.
The driver of the pickup truck stopped immediately after striking the man on 8 Mile Road near Vernier Road.