The report says migrant trafficking organizations are diversifying into other areas of crime, which broadens their international connections and creates a national security risk.

"Connections between people trafficking and other crimes, relating to terrorism as well as trafficking of minors, organ smuggling, money laundering and forging documents," is creating a major national security risk, the report says.

Over 100 people-trafficking organizations, whose guides are known as "polleros," operate along the Mexico-U.S. border, according to the report. Corruption at the municipal, state and federal level provides cover for the smugglers as they move large numbers of migrants from other nations in central America through Mexico to the U.S. border. The report notes an escalation of false papers in circulation as polleros rely on them to help move migrants across the country.

The report comes as police have been breaking up a smuggling ring operating out of Tijuana that moves Arab migrants into the United States. The Justice Department reported Friday that two more arrests have been made in connection with the ring.

Federal investigative police arrested Patricia Serrano Valdez and Elio Cesar Velasquez in the border city of Tijuana on Thursday, the Justice Department reported in a written statement. The two are accused of sheltering migrants while plans were made to smuggle them to the United States.

Earlier in the week, a former consul to Lebanon was arrested on charges of helping the smuggling ring.

Mexican authorities have worked closely with their U.S. counterparts to tighten border security in the wake of the Sept. 11 terror attacks. Since then, there has been no evidence of any terrorists successfully entering the United States from Mexico or that any have been stopped from entering.

Thursday's arrests brings the total number of arrests in the migrant smuggling case to seven, including alleged ring leader Salim Boughader Mucharrafille.

AP contributed to this report.