Businesses in Campbell Industrial Park were allowed back to work and roadblocks were lifted, following an evacuation this morning when 17 Army 155 mm mortar rounds were discovered at a business.

Officials gave the all-clear about 12:30 p.m. after the rounds were discovered to have no explosive material, fire Capt. Terry Seelig said.

A Pearl Harbor spokeswoman said a team from the Navy Explosive Ordnance Disposal unit was called to remove the mortar rounds from the Air Liquide America Corp. at 91-163 Hanua St.

The ordance team was to destroy them at a military site.

Air Liquide workers found a military transport container with the mortar rounds, which the Navy said contained no fuses or explosive compound, just before 10 this morning.

Army ordnance experts also were called in, but the matter was turned over to the Navy since its team arrived at the scene first.

Air Liquide America Corp. is a producer and distributor of cryogenic liquids and gases. It also specializes in medical gases and gases for food service.

Police, federal and Honolulu fire department officials also were dispatched to the area.

Just before 11 a.m. Hanua Street was closed between Komohana and Kuhela streets.