The shooting that wounded more than a dozen people outside a Chicago funeral home this week stemmed from an ongoing feud between a pair of rival gangs, city officials confirmed.

“There are over 117,000 gang members, 55 major gangs, along with 2,500 subset factions who are all internally in conflict with each other — and in conflict with the other rival gangs,” Chicago Police Superintendent David Brown told WGN 9.

Police said a shooter in a stolen black Malibu opened fire Tuesday at mourners near the Rhodes Funeral Home in Gresham, wounding 15 people, 10 of them women.

The funeral was for Donnie Weathersby, 31, killed July 14 in a gang-related drive-by shooting in the Englewood neighborhood, cops told the Chicago-Sun Times.

Authorities believe he was targeted in another gang squabble, according to the report.

Chicago Mayor Lori Lightfoot decried “this cycle of retaliation, picking up a gun, many times over petty grievances,” WGN-9 reported.

“Picking up a gun solves nothing, but causes so much lifelong pain,” she said.

Police say they haven’t made any arrests, although a person of interest was questioned.

President Trump on Wednesday vowed to send 200 federal agents to the city to combat “a rampage of violence.”