A 17-year-old Southwest High School student died during an off-campus fight Friday morning.

Two males, 15 and 17, got into a fight at an unknown time Friday morning and left the school’s campus to fight at the corner of the Southwest Community Center just across the street,Fort Worth police spokeswoman Sharron Neal said.

Officials said it is unclear if the 17-year-old Southwest junior died because of a medical emergency or from injuries sustained in the fight. Friends said the student had a known heart condition. Police are questioning students who were at the fight.

District spokesman Clint Bond said the students left campus during the 10:20 am passing period to fight behind the nearby Southwest Community Center.

Bond said about a dozen students were at the fight. At some point, a student ran to get the school nurse but MedStar was on scene when she arrived.

Paramedics responded to a call at 10:38 a.m. reporting a cardiac arrest at 4100 Altamesa Boulevard, the address of Southwest High School, Medstar spokeswoman Suzy Miller said.

It is not known if any weapons were used in the fight, Neal said.

The 15-year-old is being questioned by police, Neal said.

Friends said they didn’t know what prompted the fight between the two, both believed to be ROTC students.

“”He didn’t have problems with anyone. He avoided bad stuff but everyone has problems sometimes,”” said senior Jeffrey Ortega. “”He wasn’t the type of person to talk about that kind of stuff going on.””

Friends said the teen who died had a heart murmur.

“”We both had one so we would check up on each other and he’d ask me questions about it,”” senior Kassandra Morales said. “”He was a good person. I can’t believe it.””

Staff writers Jennifer Eva Ayala and Chance Welch contributed to this report.