A Navy Federal Credit Union was robbed last week, according to information the Arlington County Police Department released Thursday.
At 9:55 a.m. Saturday, three men robbed the bank branch at 875 N. Randolph St. in Ballston.
A fourth man was waiting in a nearby car, and all four got away with a "significant amount of money," according to police.
The specific amount of cash has not been released.
The four were later arrested at a Washington residence. They are in custody and "expected" to be charged with bank robbery, according to police.