The arraignment of two men in a Saturday night shooting death in Southie was marked by glares and threats in the courtroom before a physical brawl broke out on the steps of South Boston District Court.

“You’re going to hell, boy,” the victim’s brother, Thomas Scott shouted at the defendants — after apologizing to the court for what he was about to do. “I’m going to take you there (expletive).”

Maurice Scott, 38, was shot and killed Saturday night on Old Colony Avenue in South Boston.

Dwayne Diggs, 23 of Randolph and Dondre Snow, 22, of Dorchester pleaded not guilty to murder and gun possession and were ordered held without bail. A third suspect, Daquan Peters, 20, of Boston is charged with gun possession and possession of cocaine with intent to distribute. Peters — who cops say had 19 plastic bags of crack cocaine — is being held on $100,000 cash bail.

Tempers flared on the courthouse steps when a woman with Scott’s friends and family started shouting at another woman. The two were separated by bystanders, but the victim’s friend charged at the other woman a second time, knocking her down. Police and others broke up the fight, as the woman who was knocked down shouted, “I’m pregnant, I don’t have nothing to do with this.”

An emotional Thomas Scott, 37, said his brother was a construction worker with three children.

“He was a good guy, a good brother. We grew up in Mattapan. He was a loving guy, he’d do anything for anybody,” he said.

Police found Scott fatally wounded on Old Colony Avenue Saturday night. A witness got a partial license plate number from the shooter’s car, Assistant District Attorney Mark Hallal said, and another witness saw the car parked near Ashland and Elm streets with three men changing their clothes, Hallal said. A .40 caliber gun was found nearby.

Court records indicate the victim has open drug cases. Diggs, with pending assault and drug charges, and Snow, with a pending threat charge, both had electronic monitoring bracelets that showed they were on Old Colony Avenue and fled to Elm Street, Hallal said.