Kansas City, Kansas — Police were searching Sunday for two men who opened fire at a bar in Kansas City, Kansas, killing four people and wounding five others.

Police Officer Thomas Tomasic said authorities believe the shooting around 1:30 a.m. Sunday at Tequila KC Bar stemmed from an earlier altercation. He said the two gunmen had apparently gotten into a dispute with some people inside the bar, left, then returned with handguns.

No one has been arrested. The federal Bureau of Alcohol, Tobacco, Firearms and Explosives said it was on the scene to investigate.

All four men who were killed were Hispanic, but Tomasic said authorities do not believe the shooting was racially motivated. The shooting happened in a largely Hispanic neighborhood. The five others who were wounded and found outside with gunshot injuries were all transported to area hospitals and have been reported to be in stable condition.  

Police did not release any additional information about the victims. The investigation is ongoing. 

Tomasic cautioned that police are still investigating exactly what happened. He said they were reviewing surveillance video and interviewing witnesses while looking for the gunmen.

Juan Ramirez, of Kansas City, Kan., told The Kansas City Star that his 29-year-old nephew was among those killed. He said his nephew left behind a 6-year-old son and a 4-year-old daughter.

"I don't wish this upon anybody," Ramirez said.