BET Awards -- Stabbing During Pre-Party Inside Hollywood Nightclub (VIDEO)

4:55 PM PT -- Lure tells TMZ ... the club is shocked and saddened by the stabbing -- "which did not take place inside our venue." We're told the attack occurred on the street outside the club. Management says it's cooperating with the LAPD in its investigation.

There was a stabbing last night at a BET Awards pre-party filled with famous rappers ... somebody was seriously injured -- and we got crazy footage as it all was going down.

Law enforcement says a man in his 20s was stabbed inside Lure Nightclub on the dance floor Saturday night after a fight broke out ... and in the video, he's seen laying on the curb waiting for help while a panicked friend yells at cops to hurry the ambulance.

We're told the man was rushed to Cedars-Sinai with two stab wounds in the stomach and he's currently in stable condition.

The party was hosted by rapper Meek Mill ... The Game, Lil Boosie, Mase and actress Kyla Pratt were also there.

So far ... it's unclear why the fight that led to the stabbing broke out.