A gunman who killed at least 18 students and three adults at Robb Elementary School in Uvalde, Texas, on Tuesday has been named as 18-year-old Salvador Ramos.

Governor Greg Abbott said Romas “horrifically and incomprehensibly” carried out the mass shooting alone before being shot dead by law enforcement.

Ramos was a student at Uvalde High School who lived in the small city 130 kms (80 miles) west of San Antonio, according to Mr Abbott.

He reportedly shot his grandmother before driving to Robb Elementary just before midday on Tuesday, Mr Abbott said at a news briefing on Tuesday afternoon.

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An Instagram account identified by news outlets as belonging to Ramos showed him posing with what appears to be a semi-automatic weapon.

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