Police vehicles block the road to Marjory Stoneman Douglas High School in Parkland, Florida, following a shooting that killed 17 people on February 14, 2018 in Parkland, Florida. A former student armed with an AR-15 rifle opened fire at a Florida high school, killing at least 17 people, officials said, in a harrowing shooting spree that saw terrified students hiding in closets and under desks as they texted for help. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at Marjory Stoneman Douglas High School in Parkland who had been expelled for "disciplinary reasons." Pic/AFP

A former student armed with an assault-style rifle went on a shooting spree at a high school in Florida, killing at least 17 people and injuring more than a dozen others, including an Indian-American student, in one of the deadliest mass shootings in the US.