MEXICO CITY – Gunmen killed eight youths and a police chief and took dozens of restaurant patrons hostage for hours in two attacks in the drug gang-ridden state of Sinaloa, officials saidSunday. A group of hitmen sprayed four cars with bullets on a busy street in the city of Guamuchil in the early hours of Sunday, killing five young men and three female minors, a police source told Reuters. Advertisement In an earlier attack on Saturday, six other armed men caused pandemonium in the Pacific port city of Mazatlan by taking refuge in a shopping mall to escape security forces...