It was another rough morning on the T.

MBTA officials say a "power issue" between Aquarium and Bowdoin stations affected three trains and shut down service for about an hour and a half Wednesday.

The MBTA provided shuttle buses between Maverick and Bowdoin stations — causing huge backups of people trying to get to work.

Officials say their initial investigation points to an equipment failure on one train, which then shut off power to others nearby.

Carrie Jung, WBUR Edify reporter. She tweets @Jung_Carrie.

Lydia Edwards, Boston city councilor. She tweets @LydiaMEdwards.