16-year-old Liliana Olson had last been seen at 9:10 am Sunday when she was reported missing.
At 9:17 pm, police tweeted she was found safe.
Details about her disappearance were not released.
UPDATE 9/1/19 @ 9:14pm: She has been FOUND safe. Thank you for your concern.
— San Mateo PD (@SanMateoPD) September 2, 2019