Update at 2:35 a.m. — Command has been transferred from the Arlington to Alexandria Police Department for the night (the two departments have a mutual assistance agreement). Police say the man has stopped communicating with them.
Update at 8:55 a.m. — The standoff has entered its 14th hour.
Update at 11:50 a.m. — The standoff has ended peacefully. Police fired tear gas cannisters into the house around 10:00. The suspect turned himself in at 11:20. He will be charged with assault and brandishing a firearm, police said. Other charges may follow.
Update at 6:30 p.m. — Police have identified the suspect as 58-year-old Thomas Amshey (read more).
Arlington police have surrounded the Douglas Park house of a man believed to be intoxicated and heavily armed. The man barricaded himself inside his house at South Nelson and 14th Streets after threatening a neighbor with a rifle during a dispute, police said.
Dozens of Arlington police officers including the department SWAT team are on the scene, along with a mobile command center and an armored vehicle.
Police are in contact with the man and trying to negotiate a peaceful resolution to the standoff. Several streets in the area have been blocked off due to the police response.