Between eight and 10 people have been killed in a shooting by a student at a Texas high school, the police in the United States have said.
Harris County Sheriff Ed Gonzalez told reporters the majority of the dead at Santa Fe High School were students.
The suspect in custody has been identified as 17-year-old Dimitrios Pagourtzis, according to CBS News.
Police said that explosive devices had been found at the school, which is 40 miles (65km) south of Houston, and in surrounding areas.
The death toll makes this the deadliest school shooting since the one in February at Parkland, Florida. That attack left 17 dead and spawned a nationwide youth-led campaign for gun control.
Santa Fe Police Chief Jeff Powell said: “There have been explosive devices found inside the high school, and in the surrounding areas adjacent to the high school.
He advised residents to be aware of any suspicious objects they find.
“Do not touch any items that look out of place,” he said, warning residents to immediately call police.
He said a Santa Fe school police officer was among the injured.
Two hospitals south of Houston said they had received nine patients from the school shooting.
Clear Lake Regional Medical Centre said it admitted seven, and Mainland Medical Centre received two.
Several students described hearing a fire alarm go off shortly before 08:00 local time. It is not clear how the alarm was activated.
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