- Tunnel had rail system along its 627ft length
- Builders had yet to break surface on US side of border
US and Mexican authorities have discovered an incomplete cross-border drug smuggling tunnel complete with a rail track and a solar-powered lighting and ventilation system.
The US border patrol said on Tuesday that the clandestine passage measured 627 feet (191 meters), including 336ft inside US territory, in California. The tunnel builders had started working on an exit shaft north of the border, but had not broken the surface before it was discovered.