The robbery was reported just after 11:30 p.m. Monday on the 4400 block of 31st Street S., which is about halfway up the hill from Shirlington to Fairlington.
A police dog was brought in but was unable to track down the suspect.
From an Arlington County Police Department crime report:
ARMED ROBBERY, 2017-01160301, 4400 block of S. 31st Street. At approximately 11:37 p.m. on January 16, officers responded to the report of an armed robbery that had just occurred. Upon arrival, it was determined that two male suspects approached a male victim near his vehicle, both displayed knives, and told the victim to put his hands up. The suspects then rifled through the victim’s pockets and stole his belongings. The suspects then fled the scene. A K9 search was conducted with negative results. The suspects are described as approximately 5’9″ tall with a bulky build. They were dressed in all black, with black gloves, and black ski masks at the time of the incident. The investigation is ongoing.