WASHINGTON (CNN) -- Sudan's ambassador to the United States denied Wednesday that his country supports international terrorism and said the Clinton administration doesn't understand what is going on in his country or on the entire African continent.

"This administration has accused Sudan of supporting international terrorism and harboring terrorists," said Mahdi Ibrahim Mohamed in a speech at the National Press Club. "I stand before the world to proclaim that these allegations are untrue and unsubstantiated.

"They clearly indicate a lack of understanding of existing conditions in my country and a general ignorance regarding Africa generally, unfortunately."

Last month, the United States launched a cruise missile attack against the Shifa Pharmaceutical Industries plant in Khartoum, alleging that U.S. intelligence agencies have turned up evidence -- including soil samples -- showing that the plant was producing chemicals which could be used to make VX, a deadly nerve gas.

The plant was destroyed.

U.S. officials have also said they had evidence of ties between the plant and Osama bin Laden, who is considered by American officials to be a prime suspect in the bombings of U.S. embassies in Nairobi, Kenya, and Dar es Salaam, Tanzania.

But in his speech Wednesday, Mohamed said evidence doesn't support the charges being made against Sudan by American officials.

"This flimsy attempt by the U.S. administration -- to cover up a terribly embarrassing incident with fabrications on top of allegations and ... continuous assertions of compelling evidence -- is disgraceful and in no way compliments the proud heritage of American diplomacy in the past," he said.

Mohamed said despite claims that the strike was aimed at a terrorist target, Sudan believes the attack was "aggression on the sovereignty, sanctity and the territorial integrity of the Sudan."

He said that on Tuesday he formally advised the U.S. State Department that Sudan was recalling all its diplomats in protest.

Mohamed said Sudan hopes that the interruption in diplomatic relations "will be temporary given recent treatment of the State Department to Sudan. We are not at all sure just how Sudan will be regarded in the future, even if the truth is revealed about this terrible incident."