Investigators say the two men attempted to rob a Dunkin' Donuts on Route 17 in Paramus.
Detectives say the theives have targeted several stores and fast food restaurants in northern New Jersey over the past few weeks.
Police say one man pretends to shop and while the store clerk is ringing him up, the other man pulls a gun. The clerk is threatened to hand over all the cash in the store or be killed.
The pair of robbers has hit at least 13 stores and restaurants in Bergen County and the surrounding area -- and they're getting more dangerous.
"These kind of robbers, especially striking in the middle of the day...a customer could come in...or a police officer could come in during the middle of a robbery and this could potentially turn into a shootout," Morris County prosecutor Robert Bianchi said.
The spree began at a T-Mobile in Passaic on April 11. The men apparently robbed a Dunkin' Donuts on Route 46 West last week.
The robbers are described as light-skinned Hispanic males. One is in his 20s, approximately 5-foot-7. The second suspect is 5-foot-2.
The men have reportedly hit:
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