GRAPEVINE (CBSDFW.COM) – An attack in a school hallway left a student so badly injured he had to be flown by helicopter to Parkland Hospital in Dallas.

The incident happened in a Grapevine High School hallway as dozens of students were moving back and forth between classes.

Freshman David Grijalba said he passed the scene shortly after it happened.

“There was a large group of people standing around and I didn’t know what was going on. I went to my class and when I got there students walked in and told me there was kids laying on the ground,” he said.

The injured student was a 15-year-old boy who was conscious and alert according to Grapevine Police, but paramedics felt a Careflight helicopter was needed to get him to the hospital. Students said the boy was picked up and thrown to the floor by an older student.

“Grabbed him from the backpack and like, picked him up, and slammed him on the floor,” said Grijalba.

Police backed up that account, adding that witnesses said there was no argument preceding the incident. They said the 16-year-old suspect in the case approached the victim from behind before picking him up in the air. Students and a family friend of the victim said the incident was over a girl, but police had not confirmed that motive.

The victim’s parents were with him at Parkland Hospital Wednesday night but the hospital could not release his condition.

A school resource officer detained the 16-year-old who could be charged with assault. Police have not released the names of either boy because of their ages.

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