Brooklyn student arrested for loaded gun at school

The first day back for kids at the Brooklyn School for Career Development in Clinton Hill was scary after a 15-year-old boy was arrested for sneaking a loaded gun in his backpack.

The NYPD said the teen put his book bag on the metal detector belt and the alarm went off. School guards discovered a loaded Sig Sauer Mosquito .22-caliber pistol inside.

About two-dozen kids nearby were told to get outside and wait until it was safe while the student was handcuffed to the ground.

In a statement, the Department of Education called the incident deeply troubling.

"The NYPD immediately responded and safely confiscated the weapon," the DOE said in a statement. "We are working in close partnership with the NYPD as they conduct an investigation."

Mayor Bill de Blasio addressed safety concerns later Thursday. "Weapons in our schools are absolutely unacceptable," he said. "We will find them and we will take them away and there will be serious consequences to anybody who brings a weapon to school."

Parent Claudine Jones told Fox 5 that she saw it happen when she was dropping off her daughter. She said she'll be looking for another school for her daughter.

Thursday was the first day of school for most of the city's 1.1 million public school pupils.

The Brooklyn School for Career Development serves 246 students in grades 9 through 12.

With the AP and staff.