Video shows boxer Musa collapsing during fight before dying of heart attack in Germany

A video showing 38-year-old undefeated boxer Musa Yamak collapsing during a fight before he died due to heart attack in Germany has surfaced online. The video shows referee and other staff rushing to help him as soon as he fell down. His opponent Uganda's Hamza Wandera could be seen standing on the other side of the ring.