A 14-year-old student was arrested at a Queens high school yesterday after a .380 handgun was found in his backpack, authorities said.
He was entering John Adams HS in Ozone Park just after 8 a.m. when the .380 Beretta in his backpack set off a metal detector.
He started to run away, but was grabbed by school officials, authorities said.
He was charged with criminal weapon possession.