Police Capt. Phil Taormina says it looks as if the vehicle had an issue with the lock on one of its doors.
The frenzy happened Thursday in East Rutherford, near MetLife Stadium, where the New York Giants and New York Jets play.
In online videos, a man in uniform is seen running through traffic trying to collect money. Police say people exiting cars to grab cash led to two crashes.
It was not clear if anyone was injured. Police also say it’s unknown how much money spilled.
Brink’s confirmed the truck is theirs but declined further comment.
Police tweeted that anyone with information or video should contact them.