BURLINGAME -- A chain-reaction crash involving three cars sent two people to the hospital with minor injuries and marred northbound traffic on Highway 101 near Burlingame on Monday morning, according to the California Highway Patrol.

The collision was reported about 9:35 a.m. south of the Peninsula Avenue overcrossing when a car rear-ended a blue Nissan which then crashed into the back of a minivan, said Officer Art Montiel. It caused the minivan to hit the center divider and flip on its side.

Two of the drivers -- the ones who were struck -- were taken to the hospital with complaints of pain but no serious injuries, Montiel said. The motorist who reportedly caused the domino effect was not injured. None of the vehicles involved had any passengers beyond the drivers.

The aftermath blocked as many as three lanes for nearly an hour, and backed up traffic past the San Mateo Bridge to Belmont, according to the CHP.