Three additional suspects were arrested in connection with a stabbing in Barrio Logan that left a 28-year-old man dead, but a fourth suspect was still at large, San Diego police said Thursday.

Officers responded to an alley off Logan around 11:15 p.m. on March 27 after getting several reports about the stabbing.

As they arrived, they saw Abdifatah Hussein collapse to the ground, homicide Lt. Lou Maggi said in a statement. The victim was taken to a hospital but did not survive.

Investigators determined early on that the victim had been surrounded by a group of three men and a woman, then attacked by some in the group, Maggi said.

“Officers detained a male and a female shortly after the stabbing, but they have since been released as detectives continue their investigation,” he said.

Officers arrested Luis Ruiz, 30, and Elvira Ulloa, 36, in the area of 35th Street and National Avenue on Wednesday. Both were booked into jail on suspicion of murder.

Detectives determined Geoffrey Goodwell, 45, was also part of the suspects’ group, Maggi said. He was arrested on March 29 on one count of murder.

Investigators were working to identify the fourth suspect in the group.

Authorities urged anyone with information about the attack to call the homicide unit at 619-531-2293 or Crime Stoppers at 888-580-8477.