Family and police have concerned for missing Sydney woman Caitlin Daly

Family and police are seriously concerned for a missing Sydney woman who hasn’t been seen for four days.

The last known sighting of Caitlin Daly, 21, was at her home on Cronin Place, Bonnyrigg, on Monday night.

Her family reported her missing after they hadn’t heard from her since Tuesday prompting a frantic police investigation.

Caitlin is Caucasian, about 155-165cm tall, of thin build, with blonde hair.

She was last seen wearing a red top with black tights and has a scar on her left arm and a tattoo of her birth date in Roman numerals on her left forearm.

Police believe she may have visited the Wentworth Point area.

Anyone with information is urged to contact Fairfield City Police Area Command on 9728 8399.