Gardaí in Swords have appealed for help tracing 16-year-old Bernadette O'Connor.
Bernadette was last seen in Ballinteer at about 5.15pm on Sunday.
She has long black hair, and is about 1.68m (5'6") tall.
When last seen she was wearing a grey Adidas tracksuit and runners.
Anyone who can assist in locating Bernadette is asked to contact Swords Garda Station on 01-6664700, the Garda Confidential Telephone Line 1800-666-111 or any garda station.