Reports of smoke odors in the Blue Line Belmont station temporarily shut off power between California and Montrose Friday morning.
The station was evacuated as a precaution, and firefighters and crews arrived to walk the tracks and investigate the report.
They pinpointed the source of the odor, but no smoke was found.
A bus shuttle is still in place from California to Montrose to transport riders. Delays are expected.
No injuries were reported.