MIAMI -- University of Miami police said they have taken suspects into custody after four people in a car drove around campus Friday, firing a BB gun from a window.

According to police, the BB gunshots came from a silver Volvo with two men and two women inside.

Police said the group drove through the area of the Hecht-Stanford Dining Hall and the Wellness Center at about 2:30 p.m., firing BB pellets from a rolled-down window.

UM activated its Emergency Notification Network at 2:42 p.m., locking down the campus. The university sent a message to students, telling them the campus was closed and cautioning them to go inside, lock their doors and windows and not let anyone in.

A little less than an hour later, the university sent another e-mail to students, giving the all-clear and reopening the campus.

Police said the suspects were taken into custody.

No injuries were reported.