Cops were dispatched quickly to Miley Cyrus house in LA last night after receiving a report about a possible “home invasion” … but it all turned out to be a prank known as “Swatting.” More info after the jump.

Marisa Mendez

Law enforcement sources confirm … the LAPD received a 911 call at 6:50 PM to report a possible home invasion, possible shots fired.

The LAPD responded immediately … sending a chopper, and officers with high powered weapons , who immediately set up a perimeter around the home … with guns drawn.

But the cops quickly determined the house was quiet, no one was home … and there was no sign of a crime — it was a false alarm.

Law enforcement tells TMZ … officials now believe the caller is a “911 abuser.”

The call seems to fall in line with a prank called “Swatting” — in which a caller tries to trick emergency responders into dispatching law enforcement (like the SWAT team) to a home by making up a serious crime.

Cops tell TMZ … if the call was indeed a prank, which it appears to be, the caller will be arrested … and face serious criminal charges. In fact, we’re told if someone were to be hurt or killed due to the prank, the caller could even face felony charges.