(CNN) -- A shooting during a funeral for a homicide victim appears to be gang-related, St. Louis, Missouri, Police Chief Dan Isom said Tuesday.
Two men were shot multiple times and killed, and a 34-year-old man was wounded, police said. They were all attending the funeral.
No one was in custody mid-Tuesday afternoon, but police said they have strong leads.
Authorities were searching for three people. A weapon was found on the scene, police said.
The incident occurred at Reliable Funeral Home on Washington Boulevard just before noon, St. Louis Police said. The funeral was being held for David T. Davis, 27, who was shot multiple times November 19.
"We're trying to piece it all together," Isom said. "It's an ongoing feud that we have between gangs in North St. Louis. This is another product of this feud that is going on."
One wounded person was in critical condition, police said. Witnesses reported that a fourth person who was shot fled the scene, but police could not confirm that.
All of the victims were shot outside the building, police said.
Witnesses say they heard two men arguing in the alley just before they heard gunshots, according to CNN St. Louis affiliate KMOV.
CNN's Kara Devlin contributed to this report.