 On 7 October 2012, the Mexican Navy responded to a civilian complaint reporting the presence of armed gunmen in Sabinas, Coahuila.Upon the navy's arrival, the gunmen threw grenades at the patrol from a moving vehicle, triggering a shootout that left Lazcano and another gunman dead and one marine slightly wounded.The vehicle was found to contain a grenade launcher, 12 grenades, possibly a rocket-propelled grenade launcher and two rifles, according to the navy.