(Updated at 5:15) A large water main break has been reported on Columbia Pike, just in time to cause significant issues with the evening commute.

The water main break was reported at Columbia Pike and Carlin Springs Road, on the Arlington/Fairfax county line. Fairfax County police are shutting down the Pike in both directions between Carlin Springs and Route 7, according to police radio traffic.

Police have shut down the eastbound side of the Pike to pedestrian traffic, because workers are cautious to prevent the sidewalk from collapsing into a sinkhole, according to police on the scene. Fairfax Water workers are trying to turn off the water — which is still pouring out of the sewer grates in the closed-off section of Columbia Pike — before beginning repairs.

There are no estimates so far for the timeline of work to be completed, so drivers should avoid the area entirely on their commute, if possible.