CARSON (CBSLA) – A fire at the Phillips 66 refinery in Carson was knocked down after burning for hours Friday night, but there were lingering concerns about what sparked the fire and if another incident could happen again.

Flames moves so quickly that the on-site fire brigade needed assistance from Los Angeles County Fire and Long Beach Fire crews.

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The fire broke out around 7:15 p.m. Friday in the 1500 block of East Sepulveda Boulevard and involved three high-pressure crude pumps, according to Capt. Tony Imbrenda, public information officer with the Los Angeles County Fire Department.

The fire was knocked down at 9:30 p.m., Imbrenda said.

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No evacuations were ordered and no injuries were reported.

Sepulveda Boulevard was closed in both directions between Alameda Street and Wilmington Avenue, according to the sheriff’s department.

Imbrenda said checks of air quality indicated there was no threat to the public.

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(© Copyright 2019 CBS Broadcasting Inc. All Rights Reserved. City News Service contributed to this report.)