Katt Williams -- Packin' Heat in Hollywood?

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TMZ has obtained photographs of Katt in Hollywood early yesterday morning -- which show the comedian with what looks like a handgun holstered in the back of his pants.

Sources at the scene say Katt was involved in a verbal altercation with a group of people outside of Bar Lux Club at around 1:15 AM. We're told during the spat ... Katt went to his car and retrieved the alleged weapon, stuffing it in his jeans.

After a lot of yelling, everyone parted ways.

Katt's lawyer could not be reached for comment.