Los Angeles Police swarmed MILEY CYRUS' home in North Hollywood Wednesday evening with guns drawn after a 911 call said shots were fired, only to discover they were pranked.

Sgt. Jim Parker told Good Morning America that law enforcement  authorities were dispatched to the scene thinking there was a "kidnapping in progress."

Miley, 19, was not home at the time, according to reports, as she's in Philadelphia with fiancé Liam Hemsworth who's lensing new flick Paranoia there.

Officials said the hoax was an instance of "Swatting," a rib where someone tries to use the emergency system to falsely summon as many authorities (i.e., a S.W.A.T. team) as they can to a house, RadarOnline.com reported.

The Urban Dictionary defines Swatting as, "A goal achieved by hacking where the hacker tricks 911 systems into deploying SWAT to an unsuspecting victim's home under false pretenses."