Power has been restored along the Blue Line between Mall of America and Terminal 2 at the Minneapolis-St. Paul International Airport, Metro Transit said.
A power outage knocked out service on that part of the line around midnight and crews worked for hours to fix the problem. Metro Transit said.
Buses had filled in while trains were off line.
At 5:50 a.m., Metro Transit said trains were rolling all along the Blue Line. But several riders say northbound trains are experiencing delays.