Updated, Dec. 15 at 9:30AM: The Ulster County Sheriff's Office announced four men were arrested in connection with the robbery.

The United States Post Office is expected to handle more than 640 million cards, letters, and packages today, making it the busiest day of the year for the USPS. Locally is no exception, with hundreds of thousands of dollars expected to change hands.

For those in the Rifton Post Office, the day didn't go quite as planned. According to Ulster County Sheriff Van Barclum, a robbery occurred Monday afternoon at the Rifton Post Office on Route 213 in Ulster County.

A group of men jumped onto the post office counter and forcibly stole cash and money orders after the clerk opened a drawer for a transaction, according to a press release from the Ulster County Sheriff's Office. A witness at the scene gave a detailed description of the four-door sedan the men left in and a countywide alert was sent out to area law enforcement agencies. A Town of New Paltz police officer saw the sedan traveling southbound on Route 32. The car was stopped and four men were arrested on felony robbery charges: Gary A. Salmon Jr., 21, of Newburgh; Daniel E. Edwards, 25, of Newburgh; Shareef J. Goddard, 31, of Brooklyn; and Sharmaine M. Chambers of Hyde Park.

The men are believed to be involved in a series of incidents involving fraudulent checks, credit cards and money orders, according to the press release.

Paty Quyn contributed to this report.

Correction: This article was first posted with a photo of the Rosendale Post Office on Route 213. The robbery occurred at the Rifton Post Office on Route 213. Townsquare Media of the Hudson Valley regrets the error.