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. 
 
 This article appeared on page A - 1 of the San Francisco Chronicle ||||| A 35-year-old man was booked on five counts of murder after the bodies of three women and two men were found at a gruesome crime scene in a San Francisco home. 
 
 San Francisco Police officers inspect outside of a home on Howth Street in San Francisco, Friday, March 23, 2012. Five members of a family were found dead inside a home near San Francisco's City College... (Associated Press) 
 
 San Francisco Police officers inspect outside of a home on Howth Street in San Francisco, Friday, March 23, 2012. Five members of a family were found dead inside a home near San Francisco's City College... (Associated Press) 
 
 San Francisco Police spokeswoman Cmdr. Lyn Tomioka speaks to reporters outside of a home on Howth Street in San Francisco, Friday, March 23, 2012. The San Francisco medical examiner on Friday wheeled... (Associated Press) 
 
 The aftermath of the killings was so tangled that police couldn't initially determine whether they were dealing with a murder-suicide, or whether a suspect was at large. They also initially thought that at least two of the victims were shot. 
 
 "This was a complex crime scene. We had five deceased persons apparently from blunt force trauma. We didn't know what we had," police Chief Greg Suhr said. 
 
 Binh Thai Luc was taken into custody Sunday morning on five counts of murder, Suhr said. 
 
 The bodies were found early Friday by a woman with access to the home in the Ingleside District in the southern part of the city. 
 
 The victims still have not been identified and police have not been able to determine the exact causes of death or offer a motive for the slayings. Suhr said 40 investigators were working on the case. 
 
 The chief declined to say what led investigators to Luc, saying only that the suspect knew the victims and that an "edged weapon" was involved in the slayings. He said Luc had a prior criminal record, but did not elaborate. 
 
 Investigators did not believe the killings were gang-related, Suhr said. 
 
 Also arrested was Luc's 32-year-old brother, Brian Luc, on unrelated charges of drugs and ammunition possession and violation probation. 
 
 Suhr did not provide details of the younger brother's arrest, saying only that the two lived together. 
 
 The woman who discovered the bodies found one man dead in the foyer by the front door, then saw a man and a woman dead in the garage before running out and calling police. 
 
 When officers arrived, they found the other two deceased women. Investigators believe the victims were related. 
 
 The home near San Francisco's City College has a thriving immigrant community, largely from Asia.
– San Francisco police have arrested a 35-year-old man in the murders of three women and two men. The bodies were found at a home in the city amid a crime scene police called particularly grisly—and so "complex" that police couldn't say at first whether it was a murder-suicide, or whether any of the victims had been shot, the AP reports. "We had five deceased persons apparently from blunt force trauma," announced the chief of the force that arrested Binh Thai Luc. "We didn't know what we had." Luc, who had a previous criminal record, had a "relationship" with the victims that police didn't specify, the San Francisco Examiner notes. Charged with five counts of murder, he was arrested with his brother, who faces unrelated drugs and ammunition possession charges. A relative of some of the victims discovered a body in the home's entryway on Friday morning; she then found two others in the garage. Police found two more inside. Officials haven't given a motive for the killings, which occurred in what the San Francisco Chronicle calls a relatively safe neighborhood.