The 610m-long tunnel was complete with electricity, reinforced walls, ventilation and a rail system, according to federal officials. It was discovered during a months-long investigation into a warehouse for a supposed discount store in San Diego. Four people have been arrested and charged with trafficking more than $45 million in cocaine. All four men could face a maximum of life in prison if convicted. Click the link in @BBCNews’s bio for more news from the US and Canada. #Drugs #California #BBCNews