The TV channel, citing the deputy head of the city police Central Control Group, John Hein, reports that six students were leaving the school when two cars stopped near the building.
“Several people got out of their cars and opened fire, injuring two students,” the report said.
The injured 17-year-old and 16-year-old teenagers died in hospital.
Those who opened fire managed to escape and the police are looking for them.
Earlier, police in the American city of Ocala reported one death as a result of a shooting in a local shopping center.