The mood was tense at Commonwealth International on Barringer Street and the guards were tight lipped following the daring robbery.
Authorities say three suspects came in through the roof around 7:30 p.m. Thursday. They were armed and caught three employees off guard. The suspects tied them up and locked them in the vault.
The company transports money from ATM machines to banks. Deputies say the robbers got away with possibly as much as $1 million. Authorities say none of the victims were injured.
Investigators worked through the morning searching for clues.
"We are in the initial stages of the investigation," said Deputy Juan Rivera from L.A. County Sheriff's Department. "The Major Crimes Bureau is conducting the investigation. They are collecting evidence at this point."
So far authorities don't have much to work with. There is no description of the suspects and no word on if they escaped by foot or by car.
The building does have security cameras, which investigators will be taking a close look at in the days ahead.
One thing investigators will be looking at is how much information the suspects had about the operation. That could be an indication about whether or not it was an inside job.
Meanwhile, repairs are being made to the roof where the robbers entered.
If you have any information, call the L.A. County Sheriff's Temple Station at 626-285-7171.