SAN JUAN CAPISTRANO (CBSLA.com) — Police Friday investigated the circumstances surrounding a deadly traffic collision that took place in San Juan Capistrano.

According to the Orange County Sheriff’s Department, the crash unfolded just before 2:30 a.m. on the eastbound 74 Freeway at Avenida Siega Road.

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Upon their arrival to the scene, deputies learned two cars were involved in the collision.

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Paramedics pronounced one person dead a the scene. Their identity is being withheld pending family notification.

The driver of the other vehicle was transported to a hospital for treatment of unknown injuries.

Ortega Highway will remain closed in both directions between Avenida Siega Road and Antonio Parkway until further notice.

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The cause of the crash remains under investigation.