Two people were critically injured and a good Samaritan killed a suspect during a confrontation in the parking lot of a suburban Kansas City Wal-Mart.

Police said the incident Sunday afternoon in Shawnee began when two suspects hit a woman in the head from behind as she was putting her child in her car.

Shawnee police Maj. Dan Tennis says a person in the parking lot who tried to help was shot several times. Another good Samaritan then shot one of the suspects, who died at the scene.

The second suspect fled but was caught near the store.

The female victim and the other person who was shot were both hospitalized in critical condition.

Tennis said a motive for the initial attack on the woman is not yet clear.