UPDATED: Women in limo fire were headed to bridal shower

Updated at 3:05 p.m. Sunday, May 5

The California Highway Patrol is investigating the cause of a limousine fire that killed five women and injured four more on Saturday on the San Mateo-Hayward Bridge. Officer Ron Simmons said a timeline of the tragedy could be established as soon as Monday but that the vehicle inspection to determine its cause could take a few days.

The San Francisco Chronicle is reporting that the women were headed to a bridal party from a birthday party in Alameda. The fire reportedly began at around 10 p.m. Saturday in the back of the limousine.

Alameda's Rosita Guardiano told the Chronicle that her daughter, Mary Grace Guardiano, 42, also of Alameda, had befriended the bride at Crown Bay Nursing & Rehabilitation Center, where her daughter works. Mary Grace Guardiano was in intensive care being treated for smoke inhalation, and the bride was killed, Guardiano's mother told the Chronicle.

The paper identified the bride as 31-year-old Neriza Fojas of Fresno. It said Fojas' husband was staying at the Foster City hotel where the women were headed.

The Oakland Tribune is reporting that the group was headed to the Crowne Plaza hotel in Foster City as part of the bridal party. The paper has identified the other survivors of the fire as Nelia Arrellano, 36, of Oakland; Amalia Loyola, 48, of San Leandro and Jasmine Desguia, 34, of San Jose. The driver, Orville Brown, 46, of San Jose, was reportedly unhurt.

The names of the four other women who died in the fire have not yet been released.

More as this story develops.