OAKLAND (CBS SF) — Firefighters in Oakland have contained a four-alarm fire that started burning in brush alongside westbound I-580 near the Keller Avenue exit early Wednesday evening.

CHP issued a severe traffic alert when the brush fire alongside the Oakland freeway blocked lanes.

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The 511.org Twitter account posted about the lane closure shortly before 6:30 p.m.

CHP reported that there was a fire on westbound I-580 west of Keller Avenue. The right lanes are blocked. There was no word if a vehicle was involved in the fire.

Twitter user Daniel Hickey posted a brief clip showing the brush fire burning up a hillside.

As of 6:35 p.m., a fourth-alarm had been called by Oakland firefighter.

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Almost an hour later, firefighters tweeted that the fire had been contained. Fire crews would remain on the scene for a time to mop up.

CHP confirmed that all westbound lanes had reopened on I-580 shortly before 8 p.m.