A woman was killed early Sunday in the aftermath of a two-car collision on southbound Highway 101 just south of Third Avenue in San Mateo.

A Dodge Charger collided with a Toyota Yaris in the incident, which was reported to the California Highway Patrol at 1:44 a.m., CHP Officer Art Montiel said.

After the collision, a female passenger in the Yaris got out of the car and approached the Charger. She was struck by a Toyota Camry and was pronounced dead at around 2 a.m., Montiel said.

The driver of the Charger, an 18-year-old male, was arrested on suspicion of driving under the influence. The male driver of the Camry that struck the pedestrian also was arrested on a charge of DUI.

The No. 5 lane of the highway was reopened at 2:15 a.m. The other four lanes remained closed until 5:40 a.m.

Carolyn Said is a San Francisco Chronicle staff writer. Email: csaid@sfchronicle.com Twitter: @csaid