SAN FRANCISCO — The San Francisco Chronicle reports that BART restored partial service Monday between the North Concord and Pittsburg/Bay Point stations, which has been down since late last week, allowing commuters to ride a shuttle train on the rails rather than a shuttle bus on packed freeways.

Mysterious power surges, which knocked 50 BART railcars out of service Wednesday north of the North Concord Station, prompted the transit agency to shut down service to the end-of-the-line Pittsburg/Bay Point Station. Engineers and outside experts continued Monday to search for the issues that are causing train-damaging power spikes on the rails between the stations, but came up empty. For the full story, click here.