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Courtesy CNN

BATON ROUGE, Louisiana — Flames burst into the sky on this Louisiana interstate in the middle of the night, sending fire and smoke rolling into the air over Baton Rouge.

The source, a damaged tanker, was part of a multi-vehicle accident that caused a traffic nightmare on an inner-state highway yesterday.

Crews set off this controlled burn to get rid of leaking isobutane — an extremely flammable gas.

Firefighters controlled the flames nearly two hours later.

People living nearby were temporarily evacuated.