The Brief

SEPTA says a battery on one of the electric buses sparked the huge blaze at the SEPTA bus depot in Nicetown.

A massive fire erupted at SEPTA's largest bus depot on Thursday, damaging 40 decommissioned buses.

After a huge fire broke out at SEPTA’s largest bus depot in Nicetown on Thursday, officials have determined a cause for the fire.

What we know:

A spokesperson for SEPTA stated that the Philadelphia Fire Department said a battery in one of the electric buses set off the massive fire Thursday at their largest bus depot, in Philly’s Nicetown neighborhood.

Residents living near the bus depot were urged to stay indoors while firefighters fought the blaze, due to air quality concerns.

Philly’s Health Department gave the all-clear for air quality on Friday.

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