SIBIU, Romania (AP) _ A military court Wednesday suspended the trial of Nicu Ceausescu, son of deposed dictator Nicolae Ceausescu, until June 25 for further evidence and testimony from new witnesses.

Nicu Ceausescu is charged with complicity in ''genocide'' for allegedly ordering security forces to fire on demonstrators during the December revolution that ended his father's 24-year dictatorship. At the time, Nicu Ceausesc was the Communist Party secretary of Sibiu County in central Romania.

He pleaded innocent to the genocide charge but has pleaded guilty to a lesser charge of illegal possession of arms and ammunition.

Witnesses have testified that Ceausescu only ordered troops to open fire when he was drunk.

Maj. Dorel Ursu, president of the five-judge panel, agreed to allow 19 new witnesses to be called, including 10 civilians wounded in the revolution.

He also agreed to a prosecution request to call Mirela Cosa, a girlfriend of Nicu Ceausescu who was in contact with him during the height of the revolution.

During the trial, Ceausescu has been allowed to sit in the dock because he is still recovering from a stab wound inflicted Dec. 22, the day he was captured and his parents overthrown. The ousted dictator and his wife were executed Dec. 25.