How a U.S teen massacred 10 people in Buffalo and live streamed the carnage

10 people were killed and 3 injured after gunman stormed into the supermarket in Buffalo in US. The gunman has been identified as 18-year-old Payton Gendron. He has been charged with first-degree murder which is amounted to a life sentence without parole. The FBI is investigating the shooting incident and called this an act of hate crime as well as racially motivated violent extremism. Meanwhile, Joe Biden has offered condolences to the families of those who were killed. He also called for an effort to end gun violence. Watch this video to know more.