Following the attack, police departments in several U.S. cities increased patrols around synagogues and other religious institutions.<ref>{{cite news |title=Police increase patrols at Jewish institutions after Michigan attack |work=New York Times |date=13 March 2026}}</ref> Federal authorities, including the [[Federal Bureau of Investigation]] and the [[Bureau of Alcohol, Tobacco, Firearms and Explosives]], opened an investigation into the incident. Officials said the case was being examined as a possible act of [[terrorism]].<ref>{{cite news |title=FBI investigates Michigan synagogue attack as possible terrorism |work=Reuters |date=13 March 2026}}</ref> | Following the attack, police departments in several U.S. cities increased patrols around synagogues and other religious institutions.<ref>{{cite news |title=Police increase patrols at Jewish institutions after Michigan attack |work=New York Times |date=13 March 2026}}</ref> Federal authorities, including the [[Federal Bureau of Investigation]] and the [[Bureau of Alcohol, Tobacco, Firearms and Explosives]], opened an investigation into the incident. Officials said the case was being examined as a possible act of [[terrorism]].<ref>{{cite news |title=FBI investigates Michigan synagogue attack as possible terrorism |work=Reuters |date=13 March 2026}}</ref> |