The girls were last seen late Saturday, KTLA reported. Raylynn Bolt, 12, had been spending the night at the home of her friend Diana Tourdot, 14, Riverside police said.
Police went public with the search Monday.
"The girls are still missing but at this point in the investigation, it is believed the girls ran away from home," police said in a statement.
A few hours later, relatives told KTLA the two had been found.