Police officers investigate the scene of a shootout between drug gangs in Tijuana on Saturday. According to the police, at least one person died and four were injured. Just in the last week, more than 50 suspected organized crime members, many believed to be part of the Arellano Felix cartel, have turned up dead. (Guillermo Arias / Associated Press)
A vehicle was shot up in the Tijuana confrontation between drug gangs. The main battle in the city now appears to be between the Arellano Felix cartel leader and a renegade lieutenant. Each has an army of about 100 gunmen who roam in convoys of SUVs, according to a U.S. anti-drug official. (Guillermo Arias / Associated Press)
A body with gunshot wounds lies near a police truck in Tijuana. The Mexican government has intensified its efforts aimed at drug cartels. (Guillermo Arias / Associated Press)
A state police officer guards seized bullets and ammunition clips displayed to the media in Rosarito, Mexico, on Wednesday. A wave of apparent organized-crime violence has swept Tijuana, leaving scores of people dead in the last week. (Guillermo Arias / Associated Press)