Tyson Beckford, DJ Ruckus Get in Bloody Fight Over Shanina Shaik

Tyson Beckford got into an all-out brawl with DJ Ruckus over the "Bro Code" ... TMZ has learned.

It happened Thursday at Up & Down nightclub in NYC. Tyson and Ruckus have had ongoing beef over Shanina Shaik. Tyson, who was friends with Ruckus, was dating Shanina, broke up and then Ruckus hooked up with her. So, you can see why things have been tense between the guys.

We're told Ruckus saw Tyson in the club, flipped him off, and then Beckford went over to Ruckus and said if he had beef with him they should "take it out in the street." That's exactly what happened.

We're told the fight was violent. At one point Tyson was on top of Ruckus, pounding away, when one of Ruckus' friends began punching Beckford in the head.

It didn't end there. Ruckus punched Tyson in the groin, and Tyson returned the favor with his knee. A doorman called the cops, and by the time cops got there the 3 men were gone. No arrests were made.

We got video outside the club, where you can see the fight starting to brew -- but because there were a ton of cops patrolling that area, we're told Ruckus and Beckford moved the action a few blocks away.