Mexican police say they have arrested two Iraqi men planning to cross into the United States, apparently to seek political asylum.
Immigration officials at a bus terminal in the border city of Tijuana detained the two men late Friday because their immigration papers were not in order. Police said the two men, who are brothers, are not suspected of terrorist activity.
Authorities also detained the men's guide, who is a U.S. national born in Iraq.
Police say the three planned to cross the border near the U.S. city of San Diego.
Earlier this week, Mexico announced the start of a massive security effort, called the Sentry Plan, at Mexico's borders and other strategic locations to coincide with the U.S.-led war in Iraq.