Arington police arrested Rafi Khan, 23, on Thursday. He faces two counts of bank robbery.
The first robbery occurred last week at the Bank of America on Columbia Pike. The second happened Thursday when a man in a purple striped hoodie, baseball cap and sunglasses robbed a PNC branch in the 2600 block of Clarendon Boulevard about 9:50 a.m., police said.
Authorities said the suspect implied that he had a weapon, demanded money and took off with an unknown amount of cash.
Other charges may be pending, authorities said.
Anyone with information regarding the robberies can call Detective John Donaggio at (703) 228-4167.