[relee]

The school is in PG County, due south of DC, outside the Beltway. Plug the address into mapquest and you'll see a parkland (green) area nearby. I did not see any quick exit, major roads nearby.

[OReilly]

due south of DC

Due North...

[relee]

WTOP radio reports the police are searching the area near Rose Valley Elementary School. There were reports of a man carrying a long black bag. He was wearing a blue jacket and a blue ball cap. There were also reports of surveyors in the area.