Big Island firefighters extinguished a 40 acre brush fire in Kau last night.

The fire broke out on Cane Haul Road at about 6:31 p.m. When firefighters from the Pahala station arrived on scene they found a “fast-moving fire in tall grass with about two acres involved,” according to a news release.

The National Park Service and a bulldozer and backhoe assisted in creating fire beaks to contain the fire on vacant grassland. The fire was reported under control at 10:01 p.m. and extinguished at 10:17 p.m.

The cause has not yet been determined.