Some 400 passengers were unloaded on Sunday morning after a Metro Rail Transit-3 train encountered a technical problem.
The affected passengers were unloaded from the southbound train at Ayala station at 8:18 a.m., the Department of Transportation (DOTr) said in a tweet.
The passengers were able to board the next train which arrived at the station in six minutes, the DOTr said.
"One cause of electrical failure in motor is worn-out electrical sub-components (i.e. main chopper, regulator, insulator)," the DOTr said.
Such a problem can be addressed through preventive maintenance and replacement of worn out parts, it added.