Updated

Authorities sought the public's help Monday in finding two girls -- 12 and 14 -- who went missing during a weekend sleepover in California.

Detectives were trying to determine whether the girls might have run away or been victims of foul play.

"We're keeping all options open," police Lt. Christian Dinco said.

The girls were last seen around midnight Saturday at the home of one of the girls in Riverside, he said.

Police using bloodhounds were joined in the search by family members and friends of Raylynn Bolt, 12, who was described as 5-foot-7 and 120 pounds with dirty blond hair and blue eyes, and Diana Tourdot, 14, who is 5-foot-6 and 120 pounds with dark brown, shoulder-length hair and brown eyes.

Raylynn's grandmother, Sandy Brown, told KTTV-TV she dropped the girl at her friend's house about 2 p.m. Saturday. On Sunday morning, she got a call from Diana's parents saying the girls could not be found.

Brown described Raylynn as a responsible, straight-A student who contributed to household chores.

"She's a very happy-go-lucky person," Brown said.