BUFFALO, N.Y. — Postal workers across Western New York are feeling nervous after a recent wave of armed threats.

These attacks aren't random. Investigators say postal carriers are being singled out for the arrow keys they carry. In just the past four weeks, five carriers have been robbed on their routes, and some of those incidents involved guns.

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Since early November, postal carriers across Western New York have faced a string of violent attacks.

Buffalo Police reports describe one case where masked men jumped a mail carrier from behind, put him in a chokehold, and ripped away the carrier's satchel containing an arrow key, which is the master key that opens blue collection boxes.

Two other mail carriers were

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