Police were called to an undisclosed school in South San Francisco Tuesday afternoon on a report of a 14-year-old with a handgun and ammunition in a classroom. They arrived just before 1 p.m. yesterday and arrested the kid, but it's unclear in what manner he had revealed or brandished the weapon.

The teenager is being held in juvenile hall in San Mateo County.

We'll let you know if we hear anything further about what went down. But, obviously, no one was hurt.

[BCN/CBS]