In an interview with a friend of Summers, detectives learned he had been thinking of going to Tijuana, Mexico.

NPR: Suspect In LA Girl's Abduction Captured In Mexico

The passengers were part of a tour group from Tijuana in Mexico, the Department of Transportation spokeswoman Michelle Profant was quoted by AP as saying.

BBC: California bus crash kills eight and injures dozens

During the unprecedented manhunt that went as far as Tijuana, Mexico, the search for Dorner turned to Big Bear after his burning truck was found deserted on a local forest road.

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U.S. Customs and Border Protection officials reported last week that a 30-year-old U.S. citizen and SENTRI pass holder allegedly attempted to cross the border from Tijuana, Mexico into southern California with nearly 54 pounds of methamphetamine in his car.

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Oday Guerrero came to the U.S. at the age of 4 when her parents fled the violence and poverty of Tijuana, Mexico.

FORBES: Young Immigrants Fight for a Place, and for Access to Health Care

As a result of the flight suspensions, 200 Chinese citizens were stranded in Mexico City and Tijuana.

CNN: Mexican citizens to return from China

As a result, 200 Chinese citizens were stranded in Mexico City and Tijuana.

CNN: Second U.S. death linked to swine flu, officials say

The police chief of Tijuana , a city on Mexico's border with the United States, was ambushed and murdered, probably by a drug gang.

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If Oaxaca is part of Mexico's deep south, Tijuana, home to many maquiladora assembly plants, is in its dynamic north.

ECONOMIST: Politics in Mexico

Jose Manuel Valenzuela is an expert on music and violence in Mexico at the College of the Northern Border, in Tijuana.

BBC: Musicians caught up in Mexico's drug wars