The tunnel was just over half a mile long and extended more than 1,000 feet into U.S. territory, border officials said.

U.S. Customs and Border Protection agents have discovered and closed a tunnel carved into the ground between San Diego and Tijuana that stretched more than 1,000 feet into the…

The tunnel was just over half a mile long and extended more than 1,000 feet into U.S. territory, border officials said.