Police entered Robb Elementary within four minutes but fell back as they took fire.

UVALDE, Texas -- A small town in rural Texas is reeling after a gunman opened fire at an elementary school on Tuesday, killing 19 children.
Two teachers were also among those killed at Robb Elementary School in Uvalde, according to authorities.
Prior to opening fire at the school, the suspect also allegedly shot his grandmother, officials said.
MORE: What we know about Texas elementary school shooting victims so far
The alleged gunman -- identified by authorities as 18-year-old Salvador Ramos, a student at Uvalde High School -- is dead.
Joe Biden and first lady Jill Biden will visit Uvalde Sunday to grieve with the community after the attack that the president decried as "carnage" in a call for lawmakers "to act."
