WASHINGTON  —  U.S. security and law-enforcement officials say they have fresh evidence of recent efforts by Iran to evade sanctions and acquire metals from China used in high-tech weaponry, including long-range nuclear missiles, the Wall Street Journal reported Friday.

Iran's efforts are detailed in a series of recent emails and letters between Iranian companies and foreign suppliers seen by The Wall Street Journal. Business records show one Iranian company, ABAN Commercial & Industrial Ltd., has contracted through an intermediary for more than 30,000 kilograms (about 66,000 pounds) of tungsten copper — which can be used in missile guidance systems — from Advanced Technology & Materials Co. Ltd. of Beijing.

The United Arab Emirates has informed the U.S. that in September it intercepted a Chinese shipment headed to Iran of specialized aluminum sheets that can be used to make ballistic missiles. A month earlier, UAE officials also intercepted an Iran-bound shipment of titanium sheets that can be used in long-range missiles, according to a recent letter to the U.S. Commerce Department from the UAE's Washington ambassador.

The developments could present President-elect Barack Obama with an early test in responding to what many Washington security officials now say is a rapidly growing threat to the region, including U.S. allies Israel and Saudi Arabia.

Still, he added, "There doesn't seem to be any real doubt or debate whether Iran is going for the bomb or whether Iran is using front companies to import things. Everyone agrees on that around the world."