Fire investigators believe that a large brush fire near Makua Caves on Oahu’s west side may have been intentionally set.

The Honolulu Fire Department is asking for the public’s help in finding the perpetrator, who reportedly was driving a black, lifted pickup truck, fire Capt. David Jenkins said.

The fire was located at 82-180 Farrington Highway on the Kaena Point side of Makua Caves near a popular trail.

It scorched 20 acres and encroached into federal property, namely, the Makua Training Area.

Seven fire companies, including three tankers, were dispatched to the 6:45 p.m. fire, with the first company arriving at 6:51 p.m.

The fire was contained at 8:43 p.m.

Anyone with information on the fire is asked to call police.