The Army said Monday it has suspended much of the research at its flagship biological weapons defense laboratory at Fort Detrick while it makes sure it has accounted for all of its dangerous germs and poisons.

The decision follows a review of inventory controls prompted by the FBI’s conclusion that Fort Detrick scientist Bruce Ivins was responsible for the anthrax mailings that killed five people and sickened 17 others in 2001. Ivins killed himself in July after learning he would be charged in the attacks. His attorney maintains he was innocent.