Nigerian soldiers shot two contract workers dead and injured four others at an under-construction Chevron Corp. plant, causing a riot that left several buildings destroyed and halted operations, officials said Wednesday. .. Scott Walker, a spokesman for...Chevron, said that its subsidiary in Nigeria was providing support to the contractor to "handle the matter amicably." Chevron Nigeria Ltd. "wishes to reaffirm that the safety and security of its employees and contractors are accorded priority attention in its operations," Walker said in a statement. [also refers to Nigerian National Petroleum Corp.]