SAN DIEGO — One lane of Interstate 5 remained closed at Del Mar Heights Road Monday morning following a crash.

All lanes were initially blocked as a result of the collision, which involved multiple vehicles, Caltrans San Diego reported at 5:40 a.m.

By 7:40 a.m., the HOV and left four lanes had reopened. The right lane was still closed.

Check back for updates on this developing story.