Helicopter, Cops Swarmed Rihanna's Crib For Home Alarm

Rihanna fell victim to a faulty home alarm system as LAPD officers and a helicopter swarmed her Hollywood Hills pad.

Law enforcement sources say they responded to a home alarm at the singer's home Monday night obtained by TMZ -- multiple units can be seen parked outside the property. An LAPD helicopter was also spotted hovering about Rihanna's home in response to the alarm.

Our sources say it was eventually determined the alarm was accidentally triggered, through Rihanna was not home the time.

As for the heavy police presence, were told it was because of the history of intruder's at Rihanna's crib.

An intruder was arrested at the property back in May after he allegedly broke in the spent the night. The man allegedly told cops he was there to have sex with the singer though she was not home at the time, but he did not intend to do it forcefully.

The man was eventually charged with felony stalking and burglary.