Pakistan should be wary of committing to an Iran-Pakistan natural gas pipeline because anticipated U.S. sanctions on Iran could hit Pakistani companies, the U.S. special representative to the region said on Sunday. According to a foreign News Agency, the U.S. special representative to the region, Richard Holbrooke, told reporters that new legislation, which targets Iran's energy sector, is being drafted in the U.S. Congress and that Pakistan should "wait and see." "Pakistan has an obvious, major energy problem and we are sympathetic to that, but in regards to a specific project, legislation is being prepared that may apply to the project," he said, referring to the pipeline. "We caution the Pakistanis not to over-commit themselves until we know the legislation." U.S. Senator Joseph Lieberman said last week he expects Congress to finish shortly legislation tightening U.S. sanctions on Iran that will include provisions affecting the supply of refined petroleum products to Tehran, and add to sanctions on its financial sector.