Narco gangs have laid siege to a major city on Mexico's west coast with the airport attacked and tourists and locals in the holiday hotspot told not to go outside. Puerto Vallarta was on lockdown today after gang violence erupted after the leader of the brutal Jalisco New Generation Cartel was killed by the army. Cartel thugs began setting blazes throughout Jalisco to block federal forces during the raid, the Spanish-language news outlet El Universal reported as tourists cowered in their hotels