A shooting at a high school in Parkland, Florida, on Wednesday left at 17 people dead, CNN reports.

The suspect has been identified as 19-year-old Nikolas Cruz, a former student at the Marjory Stoneman Douglas High School. He was taken into custody off campus.

He slipped out of the school after the shooting by blending in with other students who were trying to escape, two law enforcement sources and an eyewitness told ABC News.

Authorities responded to an active shooter situation in the school around 2:30 p.m. Police said at around 4:00 p.m. that the suspect in the shooting was in custody.

Broward County Sheriff Scott Israel said the alleged shooter was taken into custody "without incident" and was "not a current student" at the school.

President Donald Trump was briefed on the situation and tweeted, "My prayers and condolences to the families of the victims of the terrible Florida shooting. No child, teacher or anyone else should ever feel unsafe in an American school."

Governor Rick Scott said on Twitter that he'd spoken to the Broward Sheriff Scott Israel, as well as other officials, in regards to the incident and will "continue to receive updates from law enforcement."