Halle Berry called 911 today -- the second time she's done so this weekend -- after she once again spotted an intruder on her property.
Law enforcement sources tell TMZ ... when they arrived on scene, the intruder was gone. We're told three cars -- and even a helicopter -- showed up to investigate.
As we first reported, Halle got freaked out on Saturday when she spotted a man roaming around her property. The man in question could be a paparazzo ... as photogs are known to camp out on her block, waiting for a shot.