The first shooting occurred outside Jewish Community Center of Greater Kansas City in Overland Park, while the second took place at the Village Shalom Retirement Community in nearby Leawood.
Two victims were shot in a car in the parking lot of the community center, while another died at the hospital.
Police arrested the suspected gunman, Frazier Glenn Cross, 73, outside Overland Park's Valley Park Elementary School at 2:45 p.m. on Sunday afternoon. He reportedly shouted "Heil Hitler" as they apprehended him.
“We are investigating it as a hate crime,” Overland Park Police Chief John Douglass said.
“Our hearts go out to the families who have suffered loss on this tragic day,” the Jewish Community Center said in a statement. “Our heartfelt gratitude as well to all those in Kansas City and around the world who have expressed sympathy, concern and support.”
Multiple events were scheduled at the community center when the shootings occurred -- high school students auditioning for "KC SuperStar" and drama rehearsals.