(UVALDE, Texas) — Multiple people are dead, including several children, after an “active shooter” incident at Robb Elementary School in Uvalde, Texas, law enforcement sources told ABC News.

Multiple sources told ABC News the suspect is dead.

Uvalde Memorial Hospital has confirmed to ABC News that two children died from presumed gunshot injuries in the incident.

Additionally, 13 students were being treated in the hospital’s emergency department in the wake of the incident, the hospital said. Two patients were transferred to San Antonio for treatment, while a third was pending transfer, the hospital said. A 45-year-old was also hospitalized after getting grazed by a bullet, the hospital said.

University Health in San Antonio said it had two patients from the shooting incident — a child and an adult. The hospital said the adult — a 66-year-old woman — is in critical condition. It did not have an update yet on the condition of the child.

Uvalde Mayor Don McLaughlin did not confirm casualties, but told ABC News in a text message that “this is a very bad situation.” He said the office is trying to contact parents before releasing any information.

Earlier, the Uvalde Consolidated Independent School District had said a shooter was located at Robb Elementary School and asked people to stay away from the area.

“There is an active shooter at Robb Elementary,” the school district said on Twitter. “Law enforcement is on site. Your cooperation is needed at this time by not visiting the campus. As soon as more information is gathered it will be shared.”

A school official initially clarified to 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.

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

ABC News’ Mireya Villarreal contributed to this report.

This is a developing story. Check back for updates.

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