PHILADELPHIA REFINERY EXPLOSIONS: Our cameras and Action viewers captured the multiple explosions that occurred at the Southwest Philadelphia refinery. https://6abc.com/explosion-huge-fire-at-philadelphia-refinery/5356529/ Posted by 6abc Action News on Friday, June 21, 2019

A large explosion at an oil refinery in South Philadelphia early Friday shook homes across the Delaware River in New Jersey.

The blast occurred around 3:20 a.m. at the Philadelphia Energy Solutions Refinery on Passyunk Avenue, city officials said. No injuries have been reported, though the extent of the damage and the cause of the explosion is unclear. Residents in South Jersey and Delaware County, Pennsylvania reported feeling the explosion.

#BREAKING: Viewer captures the explosion that turned into a 3-alarm fiery blaze as it was happening at the refinery on Passyunk Ave



🎥:@1nicetownbean pic.twitter.com/SV2TmYKlzf — FOX 29 (@FOX29philly) June 21, 2019

Earlier, a part of the Schuylkill Expressway (Interstate 76) was closed, but it has since been re-opened, the Philadelphia Office of Emergency Management said in a series of tweets.

Firefighters were still battling the blaze as of 7 a.m.

Residents in the surrounding area had been asked to stay in their homes but the shelter-in-place has been narrowed to to 26th Street to the west, Schuylkill Expressway to the north, Interstate 95 to the south, and 22nd Street to the east due to smoke and firefighting equipment in the area.

PES is the largest refinery on the Eastern seaboard. It produces about 335,000 barrels - 14 million gallons - of crude oil per day. It is comprised of two refineries - Girard Point and Point Breeze.

Jeff Goldman may be reached at jeff_goldman@njadvancemedia.com. Follow him on Twitter @JeffSGoldman.

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