The United States and Mexico announced they discovered a long tunnel used to smuggle drugs into the U.S. They said the tunnel began in a restaurant in Mexicali, Mexico and ended about 365 meters away in a new, three-bedroom home in Calexico, California. Calexico is a small city about 193 kilometers east of San Diego. About 40,000 people live there. American officials say drug traffickers bought land in Calexico for $240,000 in April 2015. They spent $86,000 to build the house, which was completed in December. The announcement about the tunnel was made after police arrested four people in the U.S. and two in Mexico. Two women were arrested in Arizona, including a person who reportedly bought the property in Calexico.