U.S. agents find 'sophisticated' tunnel at Mexico border
Officials said the tunnel stretched from a Mexican town into neighborhood in in San Luis, Arizona.
A press release from U.S. Immigration and Customs Enforcement said it was three feet wide and four feet high.
A border patrol agent said it stretched between two and three hundred yards.
Officials said they believe the tunnel was unfinished and intended for long-term use.
No arrests have been made.