BREAKING: Large house explosion in Bluemont amid police incident

(Updated at 9:40 p.m.) A large explosion, heard throughout Arlington, has rocked the Bluemont neighborhood after a police standoff.
A duplex where a suspect was involved in an ongoing incident with police exploded in a large fireball as police, including a SWAT armored vehicle, moved in. It followed the suspect repeatedly firing a flare gun over nearby Fields Park.
Residents in the area were being instructed to shelter in place, while others were evacuated by police.
Arlington County police sai