MEXICO CITY (Reuters) - Mexican authorities found more than 20 bodies in several cars left around a major traffic intersection in the western city of Guadalajara, officials said on Thursday. Local media reported the bodies were discovered in Mexicos second city alongside a message from drug cartels. The state attorney-generals office said there could be up to 23 dead. Guadalajara is the capital of the state of Jalisco, home to mariachi music and tequila, and was long spared the beheadings and drive-by shootings that have marked Mexicos war against drugs in other regions.