US President George W Bush will announce the move at 1730 IST in remarks that single out Sudanese President Omar al-Beshir, the officials said in a briefing arranged by the White House on Monday evening, on condition they not be named.
Washington will toughen enforcement of existing sanctions; bar another 31 companies, including oil exporters, from US trade and financial dealings; and take aim at two top Sudan government officials, they said.
"President Beshir's actions over the past few weeks follow a long pattern of promising cooperation while finding new methods of obstruction," Bush said in remarks prepared for delivery from the White House diplomatic reception room.
The Darfur conflict has cost at least 200,000 lives and forced more than two million people from their homes, according to the United Nations, though Sudan contests those estimates, saying 9,000 people have died.
Washington's sanctions will be "effective Tuesday" -- even as US diplomats launch an all-out effort to win support for a new UN resolution, including efforts to overcome possible Chinese resistance, one top US official said.
From a US perspective, a new UN resolution would apply new multilateral financial sanctions against Sudan and the three newly targeted individuals and expand an existing arms embargo from individuals operating in Darfur to any sales to Sudan's government, the official told reporters. - DDNews India
