Thirty undocumented immigrants were arrested on Saturday after allegedly entering the U.S. illegally through an underground tunnel that led to San Diego, U.S. Customs and Border Protection said. “US Agents searched the area and discovered a crude opening in the ground with a ladder inside and determined that is was a smuggling tunnel,” the agency said in a statement, adding that 23 of the 30 individuals were Chinese and seven were Mexican. Officials also warned of similar tunnels being “used to facilitate human smuggling.”
