18 children killed in deadly Texas school shooting; Biden orders US flags be flown at half-mast

As many as 18 children were killed after a gunman opened fire at a Texas elementary school on Tuesday. According to an official, the death toll also included three adults. The 18-year-old gunman was also reported killed following the attack. The attack comes 10 days after a gunman killed 10 shoppers and workers at a supermarket in Buffalo, New York, in what authorities said was a racist attack.