The Metro L Line service is interrupted Tuesday because of debris on the tracks requiring repairs.
The train service will be affected from the Southwest Station to South Pasadena until repairs are complete.
Train service is operating between the Southwest Museum Station and Union Station on the south side and from the South Pasadena Station to the Azusa/Pacific University Station to the north.
Bus shuttles are providing service from the Southwest Station to South Pasadena.
Customers and travelers can expect 20-minute delays until service is restored.