Updated | Six youths aged 13-16 charged over break-ins of food court and other stores at Westfield Miranda

Police located the group of three males and three females, aged 13-16, at Penrith.

A seventh youth involved in the thefts is being sought.

CCTV is believed to have shown the gang in action and provided police with leads.

A police statement said a group of seven teenagers entered 19 closed businesses in the food court area on Tuesday night.

"All were wearing hooded jumpers and surgical masks," the statement said.

"Items were stolen from the stores and some damage was caused.

"About 5pm yesterday, six of the youths were located at Penrith and arrested.

"Three females and three males aged between 13 and 16 have each been charged with Larceny (19 counts), enter enclosed lands (19 counts) and malicious damage (19 counts).

"All were refused bail to appear at Parramatta Children's Court today."

Earlier

About 35 cafes, food shops and other kiosk style businesses in Westfield Miranda were broken into by thieves overnight.

The Food Court was a major target in the operation, which would appear to have taken a considerable period of time.

Equipment, including cash registers, was stolen.

Forensic police were at work at the centre early today, with many businesses having to delay opening.

The strike exposed what appears to be inadequate security at the centre, where the malls are not blocked off once the entrance doors are closed.

Chief Inspector Rick Johnson, of Sutherland Shire Police Area Command, said he was awaiting information from police on the scene.

Scentre Group, which operates the Westfield centres, has been asked for comment.

More to come