Police arrested a San Francisco man Sunday in the violent slayings of five people in a home in a quiet Ingleside neighborhood.

Binh Thai Luc, 35, was arrested on suspicion of five counts of murder in connection with the killings discovered Friday at the home near City College of San Francisco, police said at a news conference Sunday evening.

Beyond the news of the arrest, police had few other details to share about the killings, which stunned neighbors in the relatively crime-free community.

Victims yet to be identified

Investigators have described the crime scene in unusually gruesome terms, saying the slayings were shocking in their brutality. Two days after the discovery of the victims, they remained unidentified and officers still had not determined the exact cause of death.

Police Chief Greg Suhr said all five deaths involved blunt trauma and added that "an edged weapon" of some type was used. Asked to elaborate, he described it as "a weapon that can cut someone."

Suhr also suggested there was a relationship between the suspect and victims, but declined to elaborate pending further investigation.

Luc, the suspect, has a criminal record, Suhr said, and may have "prior gang ties," but the police chief did not suggest the killings were gang related.

Luc was arrested Sunday morning, two days after a relative of several of the victims discovered the bodies when she visited the home, which is owned by Yingxue "Jess" Lei.

Brother's unrelated charges

Suhr would not say where Luc was arrested or describe the circumstances, other than to say he was not arrested at home, did not surrender, and was not injured during his arrest.

The suspect's brother, Brian Luc, 32, who lives with him, has also been arrested on unrelated charges of narcotics possession and being a felon in possession of ammunition, and on a probation violation, police said.

The deaths were discovered at 7:45 a.m. Friday, when a relative walked into the home at 16 Howth St. and found a body in the entryway. She discovered two more bodies in the garage before running out of the house and calling for help.

Police later found two more bodies in the back of the home. According to Suhr, the five victims were found at four separate crime scenes at the modest orange row house.

Investigators had initially thought the deaths might be the result of a murder-suicide, but they quickly reported that the scene was too bloody and confused to be sure.

Police re-emphasized Sunday that the victims were chosen and that the slayings were not the work of a random killer.