By CBSLA Staff

CASTAIC (CBSLA) — Firefighters were making progress on the Route fire burning in the Castaic area Sunday.

Officials at the Angeles National Forest Service reports that the blaze has only grown to 462 acres and is now 63% contained.

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The fire caused massive back-ups on the 5 Freeway where two lanes in each direction remain closed as of Sunday morning. One Sunday evening, Caltrans reported that all southbound lanes are open are now open, while the right lane of northbound I-5 remains closed so fire crews can monitor hotspots.

Overnight, fire crews battled the flames both from the air and the ground, which has continued into the afternoon.

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Crews With Angeles National Forest and LA County Fire work to clear hotspots in the 462 Route Fire, north of Castaic.

The 392-acre fire broke out Saturday around 4 p.m. on the 5 Freeway one mile south of the Templin Highway.

Updated acreage numbers were not immediately available at the time of the publication of this article.

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Check back for updates throughout the day as this is a developing news story.