WHITE HALL — The Pine Bluff Arsenal resumed incineration of chemical weapons Friday morning, two days after operations were suspended because of a small fire at a similar facility in Oregon.

The arsenal began processing rockets again after Washington Group International, the contractor conducting the incineration work at both sites, determined it was safe to do so.

Bob Love, acting project manager for Washington Group International, had suspended operations Wednesday after learning of a fire on the rocket-destruction processing line at the Umatilla Chemical Agent Disposal Facility, according to a news release from the arsenal.

Washington Group International is looking into the Umatilla fire and what may have caused it. The contractor is sending experts from Pine Bluff to participate in the investigation.

The Umatilla facility and Pine Bluff Arsenal each hold about 12 percent of the nation’s chemical weapons, and the process of destroying rockets laced with sarin nerve agent is occurring at both locations.

The Arkansas operations previously were halted May 11 and 12 after a small fire ignited at the Pine Bluff Arsenal. Incineration of the rockets and the liquid they contained resumed last Friday and continued until the Umatilla incident prompted another suspension in Arkansas.