OAKLAND — BART trains were single-tracking through Lake Merritt station Tuesday evening as firefighters, police officers and system staff responded to a medical emergency, authorities said.

Around 5:40 p.m., firefighters responded to reports of the emergency, possibly involving a person in the trackway, and officials quickly followed by closing the station just after 5:45 p.m.

As of 6 p.m., BART spokeswoman Anna Duckworth said a person was in a station trackway and talking and communicating with BART police. Duckworth said firefighters were able to rescue the person and take them to a hospital. That person’s condition was not available Tuesday night.

The station reopened shortly after 6:20 p.m.

The incident led to major delays in the system’s Richmond and Daly City directions. Mutual-aid bus service was set up using AC Transit’s Nos. 62 buses to the Fruitvale station and Nos. 18 and 96 buses to downtown Oakland.

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