Ashton Kutcher & Justin Bieber -- Cops Make Arrest in SWATTING Pranks

The LAPD has made an arrest in the SWATTING incidents involving Ashton Kutcher and Justin Bieber -- and the suspect is a minor.

TMZ broke the stories ... someone called cops and reported gun violence at both homes during separate incidents earlier this year.

Officials say during the Kutcher incident, the caller had advised cops that "there were individuals inside the location with guns and explosives, and that several people had been shot."

But when police arrived to the scene, they learned that it was all a hoax.

Now, cops say ... "On December 10, 2012, Hollywood Detectives arrested a juvenile from the Southern California region for the Ashton Kutcher swatting incident, as well as a similar swatting incident that took place at the home of Justin Bieber. Other swatting incidents involving this individual have been identified."