Metro police arrested a 17-year-old Antioch High School junior after, they say, he admitted to setting off a chemical explosion in a school bathroom.
The student, according to police, confessed to mixing reactive chemicals in a water bottle and putting it in a restroom as a prank.
The resulting explosion occurred at 9 a.m. Monday and forced the school to be put on lockdown.
The teenager is charged in Davidson County Juvenile Court with possession of a prohibited weapon.