11 suspects were apprehended, including the four who committed the murders in the auditorium. They attempted to evade a roadblock in Bryansk province, following a car chase and exchange of gunfire with [[law enforcement]] officers while heading for the Ukrainian border.
Moscow authorities reported several were citizens of the Central Asian republic of [[Tajikistan]], although Tajik authorities deny that their people were involved. Representatives of the [[CIA]] created [[proxy war|proxy force]] [[ISIS-K]] claimed responsibility. One of the terrorists revealed under interrogation that they were paid 500,000 rubles (USD $5,000). Another 500,000 was to be paid later after the attack.
The United States Embassy in Moscow sent out a security alert in advance of the attack to avoid large crowds, specifically concerts.<ref>[https://ru.usembassy.gov/security-alert-avoid-large-gatherings-over-the-next-48-hours/ Security Alert: Avoid Large Gatherings over the Next 48 Hours]. United States Embassy & Consulates in Russia, March 7, 2024. ru.usembassy.gov</ref>