- On Monday, at least 14 people were killed in an explosion on the St. Petersburg metro
- Peter Bergen and David Sterman: The attack is most likely the work of ISIS perpetrators
Peter Bergen is CNN's national security analyst, a vice president at New America and a professor of practice at Arizona State University. He is the author of "United States of Jihad: Investigating America's Homegrown Terrorists." David Sterman is a policy analyst at New America's International Security Program.
(CNN)According to Russia authorities, Monday's suicide bombing on the St. Petersburg metro was carried out by Akbarjon Djalilov, 22, from Kyrgyzstan, a Central Asian republic of the former Soviet Union.