Mexican authorities in the border city of Tijuana found a tunnel designed to smuggle people without documentation into the United States, the government said.
US and Mexican authorities have unearthed another sophisticated "supertunnel" used to smuggle drugs beneath their common border, the third since 2011, officials said.
Bones of potential victims of drug trafficking gangs were found in Tijuana.
A rash of decapitations and other gruesome killings have hit Tijuana since Mexican President Felipe Calderon visited the border city last week and called it a success in his drug war.
Day in Pics: 2nd September
Showbiz World - September 2, 2014
Celebrities welcome Ganapati