  Authorities were called to the plant on Wednesday along with the bomb squad, who sealed off parts of the plant when they detected the explosive material.
<coherence>   Authorities were called to the plant on Wednesday along with the bomb squad, who sealed off parts of the plant when they detected the explosive material.
 Security detected the material on Wednesday during what was described by CNN as a "routine" security check. Authorities were called to the plant on Wednesday along with the bomb squad, who sealed off parts of the plant when they detected the explosive material.