Russian authorities say they've arrested all four gunmen responsible for the terror attack in at a Moscow concert that killed more than 130 people. ISIS has claimed responsibility for the attack, but Russia says Ukraine is connected to the shooting, which Ukraine denies. Subscribe to FOX 11 on YouTube: https://www.youtube.com/channel/UCHfF8wFnipMeDpJf8OmMxDg Watch more FOX 11 on YouTube: Police Chases: https://www.youtube.com/playlist?list=PLzQIUTzrLS1G-ozh3Gr_VH_pCAVzipyjb Brazen Crime: https://www.youtube.com/playlist?list=PLzQIUTzrLS1G5JxCcXBOLn1TvLLK2AYSv Homeless Crisis: https://www.youtube.com/playlist?list=PLzQIUTzrLS1FxqzL9-ydLX3UjdJyP2S5F