Federal authorities are looking at the double shooting outside Manhattan nightclub LQ Sunday night, which left one man dead and another wounded. Queens rapper Ja Rule was throwing an Afterparty inside the club when the violence errupted outside the club. Federal authorities want to see if it may have something to do with an ongoing Federal probe of rap violence and the investigation into the Inc. Record label, sources said yesterday. The LQ nightclub is located at Lexington Avenue and East 47th Street in Manhattan.

Police identified the dead man as William Clark age 39, of Queens. Both he and Troy Moore are from Queens,NY.

Troy Moore, 37, of Hollis, remained in stable condition at New York Hospital yesterday while his brother, Tyran ‘Tah-Tah’ Moore, 34, is in the Metropolitan Detention Center in Brooklyn awaiting sentencing on a federal gun charge.

It seems the wounded man, Troy Moore, 37, is the brother of Tyran ‘Tah-Tah’ Moore, a close associate of drug kingpin Kenneth ‘Supreme’ McGriff.

McGriff has been targeted in a wide-ranging investigation into rap industry slayings and allegations he used drug money to back Murder Inc.Records, the label run by recording mogul Irving Lorenzo: – aka - Irv Gotti.

Sources say Tyran ‘Tah-Tah’ Moore has resisted pressure to cooperate with authorities in the case against McGriff.

Tyran ‘Tah-Tah’ Moore is facing a stiff federal prison sentence after he was busted last year on an illegal gun charge.

His lawyer, Marvyn Kornberg, was asked if the shooting was meant as a warning to his client to keep his mouth shut.

"It would be stupid to send a message to a man who is not cooperating by hurting a member of his family," said Kornberg. "Something like that is liable to make him want to get even."

Rapper Ja Rule's lawyer, Murray Richman, said he has not spoken to Ja Rule since the shooting. The rapper's manager, Ronald ‘Gutta’ Robinson, who was recently charged by federal authorities with laundering drug money, was not at the LQ party, Richman said.

Both men were hit by bullets from a .40-caliber automatic weapon. Police recovered a gun at the scene, but believe it did not belong to the shooter and may have been carried by Clark, who was paroled in August after serving seven years on a gun charge, or Moore, who has a criminal record that includes an assault arrest for which he served three years in state prison.

Police will try to determine if there are links between Sunday's shooting, and the younger Moore's connection with McGriff and the wide spread federal investigation into Irv Gotti's Murder Inc. record label.