NEWARK, N.J. (AP) _ A jury convicted a New Jersey man Friday of being one of jailed mob boss John Gotti's top lieutenants and found two others guilty of being members of Gotti's Gambino crime family.

The Superior Court jury found Robert ''Cabert'' Bisaccia, Anthony Proto and Samuel Corsaro guilty of being involved in a criminal enterprise, specifically the Gambino family. Bisaccia also was found guilty of being a ''capo'' or captain in the family.

Gotti, the family's New York-based boss, is serving a life sentence for murder and racketeering.

Robert Buccino, a state organized crime expert who was a key witness at the trial, said the convictions will seriously hamper the Gambino organization's activities.

''The Gambino family was always very active in north Jersey. Bisaccia's conviction will hurt them,'' he said.

Bisaccia, 57, and Proto, 56, of Belleville, and Corsaro 49, of Clifton, were also found guilty of racketeering, conspiracy to commit racketeering and other crimes. The racketeering and conspiracy counts alone carry a maximum sentence of 20 years in prison.

Superior Court Judge Theodore Winard scheduled sentencing Monday.

Defense attorneys said they would appeal.

Seven defendants were originally charged with racketeering in the case. That charge was dropped against Louis Fulco, 39, of Bloomfield; Charles Muccigrosso, 53, of Newark, and Joseph Casiere, 55, of Neptune.

The seventh defendant, Nicholas De Stefano, 65, of Newark, was found innocent of racketeering but convicted of conspiracy to receive stolen property.

Fulco and Muccigrosso were convicted of conspiracy to receive stolen property, and Casiere was acquitted of all charges.