An Algerian gas field was attacked in January . The government did n't have security measures that could have stopped the attack , it says . A different response would not have changed the outcome , says report from Statoil . At least 20 people were killed in the four - day ordeal .
An Algerian gas field was attacked in January . The site did n't have security measures that could have stopped the attack , report says . A different response would not have changed the outcome , says report from Statoil . At least 37 hostages were killed in the four-day ordeal .