Firefighters returned to a gulch between a Makakilo subdivision and H-1 freeway twice today to put out “hot spots” left over from a brush fire Tuesday that consumed about 100 acres.

Capt. Terry Seelig, Honolulu Fire Department spokesman, said firefighters responded to several flare-ups about 8 a.m. and stayed until about noon.

Crews needed to return about 2:15 p.m. to deal with an additional flare-up, this time working until about 2:45 p.m., Seelig said.

Fire investigators could not determine the cause of the blaze, but believe it began near the freeway.

As firefighters were mopping up Tuesday night, they found one or two old shells in the ground, Seelig said.

Members of an explosive ordnance disposal detail based out of Schofield Barracks went out to the scene Wednesday.

Staff Sgt. John Renna, EOD team leader for the 303rd Ordnance Battalion, said five intact rounds were located as well as several broken ones.

Renna said the ordnance discovered appeared to have been bazooka training rounds from 1940s-era weapons. They were non-explosive and were filled with wax, he said.

The rounds were taken to Schofield where they were destroyed.