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PARKLAND (CBSMiami) — A suspected shooter is in custody and as many as 7 people are dead in a shooting at a Parkland high school.

BSO confirmed the suspected shooter has been taken into custody and at least 14 people have been injured in the shooting at Marjory Stoneman Douglas High School. Sources told CBS4's Jim DeFede that as many as 7 people are dead.

A senior official said the shooter, a former student, used a rifle but may have also had a handgun.

"From what I understand, there was a time where he did attend the school. I don't know why he left," said Broward Sheriff's Deputy Scott Israel while giving an update Wednesday evening.

At last check, medical examiners were still walking through the building, looking for anyone else, said Broward Mayor Beam Furr, who was a teacher for 25 years.

Officers arrested the suspected shooter around 4 p.m., in a community near the school located at 11735 NW 47th Drive. Police later rushed to Broward North hospital with a police escort. It is why the suspected gunman was taken to the hospital. A witness told CBS4's Ted Scouten, he did not appear to be injured and he was compliant when police were arresting him.

The father of a student at the school says the shooter was allegedly "wearing a black vest with a red shirt…and supposedly he pulled the fire alarm and planned it," according to CBS This Morning.