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SOLANO COUNTY, Calif. (KTXL) — Firefighters responded to a three-alarm grass fire burning outside the south gate of Travis Air Force Base near Highway 12 on Monday.

The Suisun City Fire Departments says firefighters arrived in the area around 2 p.m. when the fire, sparked by a discarded cigarette, had already burned 5 acres.

With strong winds to fuel it, the fire reached more than 300 acres, according to fire officials.

Just before 4 p.m., fire officials at the scene said crews were mopping up and no additional resources were needed.

No homes were threatened and no evacuations were ordered, according to the Solano County Office of Emergency Services.

This is a developing story.