“A few subjects climbed the back of the building, gained entry through the roof and dropped down right in front of the safe,” said Sean Thompson, with the Roswell Police Department.
Police have released surveillance pictures of the burglars.
Officials said the thieves burrowed their way into a safe full of expensive jewelry.
“Cut through cinder block and rebar and crawled into the safe,” Thompson said.
The owner said the crew spent at least eight hours undetected in the store after cutting alarm lines to steal millions of dollars’ worth of jewelry.
“Very expensive watches, Rolex, many loose diamonds with certifications. Literally, all the engagement sets we had,” the owner said.
"This is what we call a professional crew,” Thompson said. “It seems like they came and inspected this store many times."
Police said their detectives are still interviewing the owners and anyone else who might have information that could help identify the people involved.