TOPSHOT - View of the Plaza Garibaldi square in downtown Mexico City on September 15, 2018 a day after gunmen dressed as mariachi musicians killed four people and wounded nine others. - The five assailants carried out the shootings shortly before 10pm on Friday (0300 GMT Saturday) in the busy Plaza Garibaldi -popular with foreign tourists. Neither the motive for the attack nor the identities of the gunmen were known, but the area is located near the Tepito neighbourhood, where a cartel considered the largest criminal organization in the capital operates. (Photo by Alfredo ESTRELLA / AFP)