A fight inside a high school escalated into a series of stabbings that left a student dead and three others wounded in Spring, Texas, officials say.
The stabbings happened during a fight between several students in a corridor.
The Harris County Sheriff's Department said 17-year-old student Luis Alonzo Alfaro pulled a knife during the fight and fatally stabbed one student.
Three others were wounded but were given medical treatment.
Alfaro admitted to the high school stabbing under questioning by homicide detectives and was charged with murder, the Sheriff's Department said.
He is booked into a Harris County jail with bail set at $50,000.
A preliminary court hearing is scheduled for Friday.
Officials provided few details on what may have led to the fatal high school fight; no other information was available on the teenager who passed away.
"We believe a confrontation of some sort occurred ... that ultimately led into a physical confrontation that produced weapons," Sheriff Adrian Garcia said.
"There has been some information that this may have been gang-related," he added, and the high school is out of session for the rest of the week.
Some parents said the fight was a continuation of a disturbance that broke out Tuesday. The school, which has about 3,500 students, would not confirm this.
"Every parent sends their child to school believing school should be one of those safe haven places," Spring School District Superintendent Ralph Draper said.
"This is what we spend our nights and days working toward and what I lose sleep over. In my nearly 30-year career, this is the one thing you pray never to experience."