A crash in Fairfax County, Virginia, closed some lanes of the Capital Beltway on the Outer Loop, jamming traffic during the Friday afternoon rush hour.

Part of Interstate 495 were closed between Interstate 66 and Route 50 as police investigated, according to WTOP’s Traffic Center.

For about 30 minutes, all lanes of the Beltway were shut down near the crash.

Once police reopened a few of the main lanes and the express lanes, traffic was creeping by the crash site.

Few details about the crash are available but a program operated by area transportation authorities said it involved a tractor-trailer.

Listen to WTOP for the latest on roadway impacts.

WTOP’s Dave Dildine contributed to this report.