Security guards for Selena Gomez are earning their keep, because some weird stuff's been going down at her house ... including a fan getting on her property early Sunday morning.
LAPD sources tell us officers arrested the guy as he tried to stroll away from her L.A. home, but Selena's security team had already caught him in the act. We're told the suspect jumped a fence around 1 AM, and security called cops.
The guy tried to flee, but we're told responding officers found him wandering around the neighborhood, and he said he just wanted to meet Selena.
That seems low-key compared to an incident a few weeks ago at the "Only Murders in the Building" star's house. Our sources say security also called cops when a man allegedly wrote Selena's name on a mattress, using what appeared to be blood ... and then lit the mattress on fire!
We're told her security says that guy didn't make it onto the property -- it all went down just outside her gate. Selena wasn't home during either incident, but still ... super creepy.
Cops grabbed the mattress guy, but we're still working on the status of his case. The alleged fence jumper from this morning was booked for trespassing.