At least one shot was heard on Thursday in the North Broward Preparatory School located just 12 kilometers away from the site of the school shooting spree, The Miami Herald reported.
The police arrived at the scene, cordoning off the building.
Just a day earlier, a teenager armed with a semiautomatic rifle went on a rampage at Marjory Stoneman Douglas High School in Parkland, leaving 17 people dead.
According to the report citing eyewitnesses, a fire alarm rang in the school ten minutes before the end of classes; the sound was followed by a gunshot. A gunman was detained later when trying to mix with the crowd of students.
The news of new shooting has caused a wave of reports on social media platforms.