Parts of the Pentagon Metro station flooded during Monday’s morning commute, forcing some riders to slog through a pool of dirty water to exit.

The station is currently closed. Blue and Yellow lines are temporarily bypassing it, and shuttle buses are carrying riders from Pentagon City.

The muddy water was up to riders’ ankles near an entrance at the mezzanine level.

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Crews with the Arlington Department of Environmental Services have been on scene investigating the source of the water leak since about 9 a.m., per the agency’s Twitter account. Shortly before 10, they ascertained that there was a break in a private WMATA water line. There is no more water flowing into the station, according to the department.

WMATA spokesperson Dan Stessel tells DCist that the agency isn’t yet sure of the exact source of the water, but that it was entering the station through an air duct on the mezzanine level.

“The flow of water stopped when Pentagon personnel turned off a valve off Metro property, effectively turning off all water service to the station,” Stessel says. “Our Plant Maintenance teams are out at the station removing the water at this time. Once it’s all cleaned up, we’ll have trains resume normal station stops.”

Per Stessel, there is no crowding and trains are not delayed.

https://twitter.com/ArlingtonDES/status/1199691608993591302

This story has been updated with comment from Metro.