Mexico has replaced more than 1,000 customs agents at airports and border crossings with newly trained inspectors¹ in a major crackdown on corruption².

墨西哥换掉机场和国境处1000多名海关人员，取而代之的是刚接受培训的检查员，作为对贪污腐败的反击行动。

The army took control over Mexico's customs points during the changover

Officials said the agents had been let go after their contracts were allowed to expire（期满，失效）.

They said the new 1,400-strong force had been rigorously（严格地） trained to detect contraband³（违禁品，走私品）, from guns and drugs to appliances（电气用具） smuggled⁴（偷运，走私） into the country.

During the changeover, the army took over customs border posts.

"This change is part of our response to new demands in the fight against contraband," Mexico's customs authority spokesman Pedro Canabal said.

He said that the deployment⁵ of the new agents would improve Mexico's tax collection, noting that nearly 50% of the country's VAT⁶ was collected at customs.

He said the government was also trying to seize more drugs and also guns smuggled in from the US.

Broad support

Mexican President Felipe Calderon has declared war on the illegal narcotic⁷（麻醉药，镇静剂） organisation⁸ in Mexico, deploying⁹ 40,000 troops to fight the cartels.

Thousands have been killed in drug-related violence in the past few years.

The replacement¹⁰ of the customs officers follows a similar operation in the police force, where thousands have been fired.

Last week, President Calderon was offered lavish¹¹（大方的，丰富的） praise by his US counterpart Barack Obama for his determined¹² approach to defeat the drug cartels（贩毒集团）.

The strategy remains¹³ broadly popular among Mexicans, the BBC's Stephen Gibbs in Mexico City says.

However he says many are weary of one consequence of the policy: that violence between competing drug cartels and the Mexican authorities confronting them appears to be getting worse.