Companies are reinforcing security at their facilities in theworld's trouble spots and reviewing evacuation plans after at least23 workers were killed in an attack on a natural gas plant inAlgeria.

The incident is prompting businesses operating in North Africaand other politically volatile regions to enact safety programs toprotect employees, said Tim Husted of Carlson Wagonlit Travel.Companies are “very aware” of the militant attacks and are carryingout contingency plans, which may include relocation ofnon-essential personnel, he said in a telephone interview.

“In a situation where something like this happens in an areawhere these risks are very known risks, our clients tend to be veryprepared,” Husted said.