Firefighters yesterday morning battled their fourth brush fire along the H-2 freeway’s southbound lanes since Tuesday.

Two lanes of H-2 were closed for about an hour as a result of yesterday’s 11:20 a.m. blaze, which occurred on the Waianae-side embankment about three-quarters of a mile past the Mililani offramp and just south of Kipapa Bridge, said fire Capt. Terry Seelig.

It was the second brush fire near the bridge this week.

Investigators were still looking for possible causes, Seelig said. "But especially with the pattern, it appears most likely they were intentionally set," he said.

Seelig urged the public to call 911 immediately when they spot such fires.

While all four of this week’s fires have been relatively small, they have disrupted traffic and had the potential to grow and become a danger to property, he said.

Firefighters battled two blazes Wednesday along H-2 — one near Kipapa Bridge and the other near the H-1/H-2 merge.

Tuesday’s blaze happened near the Ka Uka offramp, Seelig said.