UPDATE: 18 children, 3 adults dead in shooting at Texas elementary school

It's unclear whether adult tally includes 18-year-old shooter

UVALDE, Texas (AP) — An 18-year-old gunman opened fire Tuesday at a Texas elementary school, killing at least 18 children as he went from classroom to classroom in the latest gruesome moment for a country scarred by a string of massacres. Law enforcement killed the gunman, officials said.

The death toll also included three adults, according to state Sen. Roland Gutierrez, who said he had been briefed by state police. It was not immediately clear whether that number included the attacker.

The massacre at Robb Elementary School in the heavily Latino town of Uvalde was the deadliest shooting at a U.S. grade school since a gunmen killed 20 children and six adults at Sandy Hook Elementary in Newtown, Connecticut, almost a decade ago.

Earlier story:

UVALDE, TX (WKBT) — Sixteen people are dead, including 14 children, one teacher and the 18-year-old man who shot them at an elementary school shooting in Texas. Police are believed to have killed the shooter.

The shooting happened Tuesday at Robb Elementary School about 85 miles west of San Antonio. The Uvalde Consolidated Independent School District posted about an “active shooter” at Robb Elementary at 12:17 p.m. local time and said law enforcement was on site.

The shooter had a handgun and possibly a rifle, said Texas Gov. Greg Abbott.

This is a developing story and will be updated.