14 children and one teacher have been killed in a shooting at a primary school in Texas, the state governor has said.

The attack happened at Robb Elementary School in the city of Uvalde, around 80 miles west of San Antonio.

Governor Greg Abbott identified the gunman as Salvador Ramos,18, who lived in the city and entered the school with a handgun and possibly a rifle.

He added that the gunman is dead and is believed to have been killed by responding officers.

More than a dozen children were taken to Uvalde Memorial Hospital, while University Hospital in San Antonio, said a 66-year-old woman was in critical condition.

Robb Elementary School has an enrollment of just under 600 students.

As an elementary school, classes will be for children aged between around five and 11 years old.

Earlier, The Uvalde Consolidated Independent School District said that all schools in the district were locked down because of gunshots in the area.