SAN FRANCISCO (CBS SF) — An fire on the tracks caused by an equipment problem halted BART service between San Francisco and the Peninsula early Friday, causing major systemwide delays.

The issue was first reported at 4:45 a.m. due to an equipment problem on the track south of 24th Street Station in San Francisco. A bad insulator, one of the pieces of equipment that powers the third rail, failed and caused a small fire.

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The San Francisco Fire Department responded and cleared the debris at the site of the fire.

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All trains stopped in both directions as technicians worked on the problem. East Bay trains were being stopped at 24th Street. For a time, there was no service from Peninsula stations into San Francisco.

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While service was restored at around 6:45 a.m., there were still major delays.