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Several cars of a CSX train derailed this morning near Rhode Island Avenue NE, leading Metro to suspend service between the NoMa and Brookland stations. Streets in the area are also closed to traffic.

According to D.C. Fire and EMS, three cars are leaking some sort of hazardous material or materials. Metro is providing shuttle buses to the affected stations.

Update, 8:42 a.m.: CSX says no injuries have been reported.

Update, 9:50 a.m.: FEMS says no evacuations have been ordered and only one railcar is leaking sodium hydroxide. D.C. police add that pedestrian access surrounding the area is limited.

Update, 11:20 a.m.: The leak of sodium hydroxide—a chemical similar to bleach or Drano—has been plugged, Mayor Muriel Bowser said on Sunday morning. According to the mayor, the 175-car train derailed around 6:40 a.m. on its way from Maryland to North Carolina: 81 of the railcars were empty and 13 came off the tracks. FEMS determined during its response that other than the leak, “there were no problems,” Deputy Fire Chief John Donnelly explained. He added that while officials don’t yet know the specific amount of sodium hydroxide that leaked, the District is coordinating with CSX.

“We don’t know the cause,” Bowser said, adding that officials would provide an update around 5 p.m.

The Federal Railroad Administration is leading the investigation into the derailment, “unless we hear otherwise from the [National Transportation Safety Board],” Bowser said. Certain Amtrak and MARC service may be affected by the incident, she added. Meanwhile, Metro’s Red Line is still seeing delays:

Update, 2:11 p.m.: Metro service remains suspended between NoMa and Brookland.