Three men who were wearing ski masks and pointing guns entered the credit union, located a block from Ballston Common Mall, just before 10:00 a.m. on Saturday, according to Arlington County Police spokesman Dustin Sternbeck.

They shouted threats and forced the 13 customers in the business to lie on the ground. The men made off with several bags full of cash — an undisclosed but substantial sum of money — and were whisked from the scene of the crime by a getaway driver who was waiting outside, Sternbeck told ARLnow.com.