2 in custody after gunmen dressed as mariachis kill 5 in Mexico City plaza

Police are questioning two people after a group of men in mariachi outfits opened fire at a Mexico City restaurant, killing five people, an official with the city's Secretary of Public Security Office told CNN on Sunday.
ref:https://www.cnn.com/2018/09/16/americas/mexico-mariachi-shooting-garibaldi/index.html