Credit and debit card fare machines were closed at all MBTA subway stops on Friday night for an undisclosed reason.
The agency said in a service alert on its website shortly before 10:30 p.m. that “Credit/Debit card fare machines sales are unavailable at all stations until further notice. Fare machines sales are unavailable on mbta.com.”
A T spokesman said in an e-mail that the agency is “actively working to correct the issue. IT Infrastructure and Network teams are responding.”
The MBTA did not say what caused the problem or when it would be fixed.
Travis Andersen can be reached at travis.andersen@globe.com. Follow him on Twitter @TAGlobe.