UVALDE, Texas — Fourteen students and a teacher are dead after a shooting at Robb Elementary School in Uvalde, Texas, according to Gov. Greg Abbott.

The 18-year-old suspect, a student at Uvalde High School, is also dead, he said.

“He shot and killed horrifically and incomprehensibly 14 students and killed a teacher,” Abbott said during an unrelated press briefing.

The suspect also allegedly shot his grandmother before entering the school and again opening fire, Abbott said. He did not say anything further about her condition.

Abbott said the shooter — identified by law enforcement sources and the governor as Salvador Ramos — had a handgun and also possibly a rifle.

“When parents drop their kids off at school, they have every expectation to know that they’re going to be able to pick their child up when that school day ends. And there are families who are in mourning right now,” Abbott said. “The state of Texas is in mourning with them for the reality that these parents are not going to be able to pick up their children.”

Families of the deceased were being notified, he said.

President Joe Biden has been briefed on the attack and will likely address the nation this evening, press secretary Karine Jean-Pierre said on Twitter.

A school official initially told ABC News that the shooting took place off-campus, and that Robb Elementary School was under lockdown.

The school informed parents shortly after 2 p.m. local time that students had been transported to the Sgt. Willie Deleon Civic Center, the reunification site, and could be picked up.

Uvalde, Texas, is located about 90 minutes west of San Antonio.

The Bexar County Sheriff’s Office and San Antonio Police Department are sending aid, and the FBI is responding.

The Houston Field Division of the Bureau of Alcohol, Tobacco, Firearms and Explosives also said it is assisting in the investigation.