News Alert: Gunman at a Texas elementary school kills 21 students and two adults before being fatally shot, officials say

An 18-year-old gunman on Tuesday fatally shot 21 children and two adults at a Texas elementary school before he was killed by law enforcement officers, officials said.

The shooter — identified by Texas officials as Salvador Ramos, of Uvalde — also shot his grandmother before going to the school, three law enforcement sources told CNN. State Sen. Roland Gutierrez told CNN the grandmother was airlifted to San Antonio and “is still holding on,” according to information he was given by the Texas Rangers.

The gunman is believed to have acted alone, Uvalde Consolidated Independent School District Police Chief Pete Arredondo said.