YG Arrested for Robbery ... In Vegas Casino

7/13/2018 12:50 AM PDT

EXCLUSIVE

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YG's facing a felony robbery charge for allegedly yanking a dude's chain off his neck and taking off with the diamond-laced pendant ... and we're told there's video evidence too.

The rapper was in a Vegas court Thursday after a warrant was issued for his arrest and he turned himself in. YG was hit with felony robbery and he was released after posting $20k bail.

Vegas police tell us ... the incident went down in late May at the Cosmopolitan around 4 AM, after a man approached YG and asked for a pic but was turned away by his crew. We're told the guy told YG he's not a real celeb ... and casino's surveillance footage shows YG retaliating by yanking a chain off his neck.

We're told the chain fell to the ground, and YG is then seen on video picking up the necklace pendant -- valued somewhere between $3,000 and $9,000 -- before taking off.

We broke the story ... the alleged victim is also suing YG[1], claiming he had his goons beat him up before he snatched his jewelry. The guy wants at least $250k.

References^ also suing YG (www.tmz.com)

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