TEHRAN, Iran - Drug traffickers in well-armed desert convoys roll across the border from Afghanistan. Standing in their way are Iranian soldiers and drug agents trying to choke off one of the world's busiest pipelines for opium and heroin.

The battles — waged far from the world's attention in the arid badlands of eastern Iran — represent one of the dwindling patches of common ground between Tehran and the West. The United States has applauded Iran's anti-drug campaign and European nations help fund the fight.

But now this international support could be threatened by the standoff over Tehran's nuclear policies.

Western nations have told Iran that they could cut off any new help to Iran's anti-drug units unless the Islamic regime halts uranium enrichment, which Washington and its allies worry could be used to develop nuclear arms.

The warning was a small but potentially significant item tucked amid an array of trade and economic incentives seeking to sway Iranian leaders to strike a deal. Iran has not formally responded to the package, presented June 14 by the five permanent U.N. Security Council members plus Germany.

But Iran has repeatedly said it will not back off uranium enrichment — pushing the European Union this week to expand ... >>>