EL PASO, Texas — Latino groups say they’ll march through the Texas border city of El Paso a week after a mass shooting that authorities say was carried out by a gunman targeting Mexicans. Organizers said Saturday’s march will begin at the port of entry on the U.S.-Mexico border. Mexican officials say eight Mexican nationals were among 22 people killed in last weekend’s attack at a Walmart. An El Paso detective said in an arrest affidavit that 21-year-old Patrick Crusius told investigators he targeted Mexicans at the store with an AK-47 rifle.