Abdelmalek Sellal said the militants had planned the attack over the past two months, researching the layout of the plant with the intention of blowing it up.
阿卜杜勒马立克·塞拉勒说过去两月以来武装分子就一直在策划这场袭击，他们研究了气田的布局，想炸掉这里。
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