A party in a Kansas City park ended in deadly gunfire in the early hours of a Sunday, when an unknown assailant opened fire on a group near 8th and Jefferson just before 4 a.m. Twenty-nine-year-old Roberto E. Mejia of Kansas City, Kan., was struck in the head and later died at a hospital. A second person suffered a gunshot wound to the hand.

Witnesses said the shooter ran south from the scene. Mejia’s death was the city’s 40th homicide that year. Authorities have not publicly identified any suspects or announced arrests; the investigation remains open and police are asking anyone with information to come forward.

If anyone was at the gathering near 8th and Jefferson that night or has information about who ran south from the park, contact investigators.