Two of the five people killed in what has been described as a drug-related shooting in a Landover apartment Friday night were identified by Prince George's County police and neighborhood residents yesterday as a 34-year-old Landover resident and a 21-year-old New York City man.

The Landover resident was identified by police and relatives as Lloyd G. (Donnie) Chambers. Relatives at an apartment complex on West Forest Road said that Chambers, a native of Jamaican, came to the United States two years ago. He had lived at another Landover apartment for the past year after initially staying with his father in New York City, they said.

"I never expected anything like this," Mae Shaw, Chambers' mother, said yesterday. "I really, really don't believe it has happened."

The New York man was identified by Prince George's police as Everton Mitchell. New York City police said Mitchell's address, 121 196th St., is in the Bronx. A Prince George's police investigator said Mitchell's father said that Mitchell, also a native of Jamaica, had worked at a store in New Jersey.

Prince George's police said they have tentatively identified two other men who were fatally shot in the head and chest about 8 p.m. Friday in an apartment at 2320 Brightseat Rd., near Landover Mall. But officials declined to release the men's names, saying that their identities had not been confirmed from FBI fingerprint records.

A woman killed in the shootings has not been identified, police said. A second woman, who was shot and wounded, remained in serious condition at the Prince George's Hospital Center after twice undergoing surgery for a bullet wound in the neck, police said.

Police, who reported finding a small amount of marijuana and cocaine in the apartment where the shootings occurred, described the slayings as drug-related but said they had not established a motive. Investigators were looking for three men who were seen leaving the Landover area in a red, late-model car.

County police sources said they received help in identifying the victims from District police, who cited possible links to a Northeast apartment complex believed to be a center of illegal drug activity.

A county detective, who asked not to be identified, said that three of the men had been reported to have arrest records by District police. D.C. police said they could not confirm the report.

In an interview at her apartment, Shaw, Chambers' mother, said she knew very little about her son's friends and personal life. "I don't know anything about my son," she said. "He wasn't living here. He was a grown man."

Family members and neighbors said they had been unaware of any drug activity. "I can't say yes . . . and I can't say no," said Shaw, 62, who said she had come to the United States from Jamaica with several relatives in 1975. "I don't know."

Relatives said Chambers frequently visited a wheelchair-bound man known as "Chief" at the apartment where the shootings took place. Also, "Chief" telephoned Chambers at his relatives' apartment, they said.

A county police source said "Chief" may have been one of the victims. One of the men whose identity has not been released is believed to have been partially paralyzed during a drug-related shooting several years ago in New York City, the source said.

Shaw said her son was arrested several months ago after a dispute with a girlfriend, but she added that the woman later dropped the charges. She said that Chambers had not been involved in any other incidents.

Michael Shaw, 22, Chambers' brother, said that Chambers "didn't talk a lot or tell us his business. I don't know where he worked."

Michael Shaw said that another brother had been deported to Jamaica last year because of what he described as drug-related legal problems.

Mae Shaw said Chambers had gone to her apartment Friday evening for a curried chicken dinner. She heard about the shooting on a late-night television news program and immediately feared that her son might have been involved, she said.

Police said they have questioned a woman who leased the third-floor, two-bedroom apartment at the Village in the Woods complex, where the shootings occurred. An investigator said the woman told detectives that she had subleased the apartment to one of the victims.