Wearing masks, all-black clothing, and armed with assault rifles, the robbers attacked the driver of a Garda truck in the parking lot of a Wells Fargo Bank.
"The timing of such, the armored car arriving at a certain time, would just indicate that it was preplanned and well planned," FBI Special Agent-In-Charge Edward J. Hanko told WPVI.
As one suspect ordered the guard to the ground, another grabbed the cash. The pair then hopped into a green minivan driven by a third suspect, according to WPVI.
Officials told NBC
A witness said the driver was "roughed up" during the incident.
"I went over and asked the guy if he was OK," witness Gabriel Montalvo told NBC. "He just said 'I'm fine.' I said, 'You're shaking. You sure your OK?' He said 'I'm fine, this isn't the first time I've been robbed.'"
Police are still investigating and surveillance video is to be released soon.