Officers responded to several 9-1-1 calls from the Lucky Star Lounge at 2090 Dolittle Drive about 12:45 a.m., Decoulode said.
The two people found dead at the scene were a 23-year-old man from Union City, the brother of a woman celebrating her 28th birthday; and a
26-year-old woman from Hayward who was a cousin, Decoulode said.
Another six were wounded and taken to local hospitals. All are expected to survive, he said. Most of the people at the birthday party, including four of the wounded, were students at California State University, East Bay, and the University of California, Berkeley, and one was a student at the University of California, Los Angeles.
Police were looking for an Asian male in his 20s, about
5 feet 7 inches tall, weighing 140 pounds, who may have played a role in the shootings.
The attack followed an argument between two small groups of people outside the bar, who are not believed to have known one another and were unrelated to the larger birthday group, officers said.
According to officials, once the dispute ended, one man left and returned with a semiautomatic handgun that he began firing from the sidewalk.
"It's hard to say if he was just shooting at anyone there or had a ... target," Decoulode said. "We're not certain of his intentions at this point."
There were 50 to 75 people inside and outside the Lucky Star Lounge when the shooting happened.
"We're working on leads to positively identify (the suspect)," Decoulode said. "We have some solid leads in that direction."
Police were interviewing a number of witnessess after the incident.
Decoulode added, "It's really amazing people would go to this kind of violence over this kind of dispute."
There had been no other problems or violent incidents in the neighborhood recently, and before Friday night's shooting San Leandro had recorded only two homicides this year.
Police are asking anybody who was present at the scene but did not speak with officers or who had left the scene to call the San Leandro Police Department at (510) 577-3232.