SAN DIEGO — Two people were injured Monday morning after a wrong-way crash involving multiple vehicles shut down Interstate 5 near Balboa Park, according to police.

The crash happened just after 3:00 a.m. on northbound Interstate 5 near State Route 163, according to California Highway Patrol.

Two people were transported to local area hospitals. Both suffering from minor injuries, according to CHP.

All four lanes were temporarily shut down for about an hour and traffic was diverted to Hawthorne Avenue. As of 6:00 a.m., all four lanes were re-opened to traffic.

According to police, one person was taken into custody. It is unclear how that person was involved in the crash.

Investigators are trying to determine what caused the crash and if alcohol or drugs were factors in the crash.