The FBI launched an investigation after a group of armed robbers stole a large sum of money from a Brinks employee outside a south suburban bank on Tuesday, police said.

Just before 9 a.m., three armed suspects approached a Brinks employee who was servicing an ATM outside the Chase bank at 3115 Ridge Road in Lansing, Illinois, police said.

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The suspects held the Brinks employee at gunpoint and stole a  substantial amount  of money before fleeing. The Brinks employee was not injured in the robbery, police said.

Lansing police are collaborating with the FBI on an investigation into the incident.

Anyone with information is encouraged to contact the FBI by calling 312-421-6700 or by submitting a tip at tips.fbi.gov.

No additional information was immediately available.
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