NEW : U.S. officials say they are not on heightened alert . Tourism to Nuevo Laredo has been on the decline because of violence . `` We are on alert as usual , because that is how we must be in Nuevo Laredo , but there is no special alert here with regards to what the U.S. authorities in Texas are saying , '' said Michelle Jones-Salazar , spokeswoman for the state 's public prosecutor 's office in Nuevo Laredo . The Laredo drug cartel is planning to target Zetas citizens , officials say . Nuevo Laredo , Mexico is across the border from Mexico , U.S. .
NEW : U.S. officials say they are not on heightened alert . Tourism to Nuevo Laredo has been on the decline because of violence . The Laredo drug cartel is planning to target Zetas citizens , officials say . Nuevo Laredo , Mexico is across the border from Mexico , U.S. .