UPPER MARLBORO, Md. (AP) _ A friend and two teammates of basketball star Len Bias have been indicted by a grand jury investigating the University of Maryland athlete's cocaine- induced death, it was reported Friday.

Washington television stations WRC-TV and WUSA-TV quoted unidentified sources as saying that indictments were issued against Brian Lee Tribble, a longtime Bias friend, and David Gregg and Terry Long, teammates who shared a dormitory suite with Bias.

WRC-TV said Tribble was indicted on charges of distribution of cocaine and PCP and obstruction of justice, and Long and Gregg were indicted on charges of possession of cocaine.

The three were with Bias when he collapsed in his dormitory room on the College Park campus on June 19. He later was pronounced dead at a hospital.

The Prince George's County grand jury ended its investigation Friday and said it had voted to return indictments, which were ordered sealed by the county prosecutor.

Members of the grand jury, who left Prince George's County Courthouse after five days of hearings, refused to say how many people were charged or who they were.

Arthur A. Marshall Jr., the county prosecutor conducting the investigation, would not confirm or deny the TV reports.

''You've seen the order and you know the records are sealed,'' Marshall, reached at a country club, told The Associated Press.

Tribble's attorney, William Cahill, when reached at his Baltimore office, refused all comment.

Alan Goldstein, an attorney for Long and Gregg, would not confirm the reports Friday evening.

''I have not gotten any official kind of word or anything. My sources are newspaper reporters who tell me that there have been some indictments,'' Goldstein told the AP.

If Gregg and Long were indicted, Goldstein said, he expected to be notified Monday or Tuesday, and that they would surrender.

Tribble, Long and Gregg did not testify before the grand jury. Under Maryland law, anyone who testifies before a grand jury under subpoena in a drug-related case is immune from prosecution.

Marshall did not seek a subpoena for Tribble. He did issue subpoenaes in the names of Gregg and Long, but did not call them to testify.

The grand jury will return Aug. 11 to begin an inquiry into allegations of drug use by other athletes, possible gambling on a game by at least one member of the Maryland basketball team, and the actions of university officials, including basketball Coach Lefty Driesell, in the hours after Bias' death.

The indictments will remain sealed until those named have been arrested or served with notice of their indictment, said Norman Pritchett, clerk of the Prince George's County Circuit Court.

Tom Madison, one member of the grand jury, said he thought the inquiry ''was handled very well'' by the prosecutors. ''Everything came out that should have come out,'' he said.

Madison said he was disappointed that Bias' parents, James and Lonise Bias, did not appear before the grand jury. County Prosecutor Arthur A. Marshall Jr. had offered them the chance to testify.

Other members, who refused to give their names, said they were satisfied with the results of the investigation and the way it was handled.

Marshall said last week that he believed the cocaine that killed Bias had been supplied by Tribble. The prosecutor said at the time he believed there was sufficient evidence to return an indictment against Tribble.

Any indictments probably would deal with use, possession or distribution of drugs, he had said.

University officials such as Driesell and Dick Dull, the athletic director, also were not called before the grand jury. Dull is expected to be a witness next week when the investigation turns to an examination of the extent of the drug problem on the university's College Park campus.

The grand jury completed hearing testimony Friday morning with Tom ''Speedy'' Jones, a member of the basketball team, as the last witness.

Bias's death came two days after he was picked by the world champion Boston Celtics as the second basketball player chosen in the 1986 National Basketball Association draft.