Woman Arrested for Brandishing Gun Outside Diddy's BET After-Party

A woman trying to make her way into Diddy's BET after-party was arrested outside the mogul's house after she allegedly flashed a gun at other partygoers.

LAPD sources tell TMZ ... the woman was in her car near Diddy's house and a security checkpoint for the event very early Monday morning, and got pissed off that other cars weren't clearing out of her way fast enough. We're told she pulled out the weapon and waved it at folks she believed to be causing the delay.

Police were called and they rushed to the scene, where they found the 30-year-old woman had already been detained by Diddy's security team. Cops searched her car and found a loaded handgun.

A source at the party tells us the woman was not invited to the party, and more importantly -- never made her way inside the event. We're told she was trying to make her way past the first security checkpoint when the incident occurred.

She was taken into custody and booked for possession of a loaded firearm -- she was later released on her own recognizance. Thankfully, no one was injured in the dust-up.