Justin Bieber is being investigated on serious gun control charges — Nerf gun control!

Here’s the story. Justin was in Ottawa, Canada in November when a female employee of the venue where he was performing filed a police report, claiming Bieber — or someone who was Biebs adjacent — assaulted her.

The woman told Canadian cops she was hit by something.

We now know what the something was … a kid-safe projectile from a Nerf gun. Justin was Nerf fighting with his 3-year-old brother and 4-year-old sister and apparently one of the darts hit the woman.

We’re told the woman pitched a fit and told Bieber’s people she was a security guard for the venue and was royally p***ed off. She filed a police report and the cops are actually taking it seriously — they’ve already interviewed some people at the venue.

Getting hit by a Nerf projectile is definitely annoying, but criminal? Be serious, eh!