Phoenix transit officials say light rail trains are moving again after a power outage affected the entire line Thursday.
The outage happened around 1:15 p.m., bringing the trains that run between Phoenix, Mesa and Tempe to a standstill. Within 45 minutes, the Metro Valley Public Transportation Agency said minimal power was being restored as workers reset the line's substations.
It's not immediately clear what caused the outage.
Authorities were asking riders to bear with transit workers and train operators as they brought the system back on line.
In operation since 2008, the light rail has an average of 45,000 boardings a day.