PITTSBURGH — Two people fired into a van outside a Pittsburgh school at dismissal time Wednesday afternoon, sending a 15-year-old student to a hospital where he later died, authorities said.

Two people reportedly approached the school van outside Oliver Citywide Academy and fired into it, hitting the male student, Pittsburgh Public Schools said.

No arrests were immediately announced. Police said they were reviewing surveillance videos and seeking witnesses.

Oliver Citywide Academy describes itself on its website as “a full-time special education center serving grades 3-12.”