By CBSLA Staff

SANTA CLARITA (CBSLA) – The California Highway Patrol issued a Sigalert Saturday closing the number four and five lanes of the southbound 5 Freeway at Calgrove Boulevard in Santa Clarita for an unknown duration, due to a brush fire.

According to authorities, the fire had consumed at least three acres by 1:12 p.m.. The forward progress of the fire has been stopped.

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No injuries have been reported in the fire.

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The cause of the blaze is still under investigation.

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(This is a developing story. Check back for updates.)