The U.S. State Department has issued an urgent travel warning for Americans heading to Mexico.
The warning said Americans should be aware of possible violent retaliation for this week's arrest suspected Zeta Drug Cartel members and family members in the United States.
The Zetas are based in Nuevo Laredo just across the border from Laredo, Texas.
Copyright 2012 by Click2Houston.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.