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Video captured by Fox News' Miami affiliate, WSVN, showed law enforcement apprehending the suspect in the Marjory Stoneman Douglas High School shooting.

"They do have a subject in custody," WSVN journalist Ralph Rayburn said, adding that the episode took place on Northwest 47th Drive in Parkland, Fla.

The suspect, a male in a burgundy shirt and black pants, was identified by witnesses on scene.

Rayburn said a teacher identified the suspect before he slipped out of the school building.

Fox News and WSVN are withholding the suspect's name pending a law enforcement confirmation and investigation.

Rayburn said Broward County authorities put out a "dragnet" of four to five square miles around the school, including a residential area.

Watch more above.

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