Companies are reinforcing security at their facilities in the world's trouble spots and reviewing evacuation plans after at least 23 workers were killed in an attack on a natural gas plant in Algeria.

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

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