The US president, Barack Obama, was today awarded the 2009 Nobel peace prize "for his extraordinary efforts to strengthen international diplomacy and co-operation between peoples".

The Nobel committee said "only rarely has a person such as Obama captured the world's attention and given his people hope for a better future".

"His diplomacy is founded in the concept that those who are to lead the world must do so on the basis of values and attitudes that are shared by the majority of the world's population," the citation said.

The committee said Obama, who only took up the presidency in January, had been acknowledged for his calls to reduce the world's stockpile of nuclear weapons and working for world peace.

"Obama has as president created a new climate in international politics. Multilateral diplomacy has regained a central position, with emphasis on the role that the United Nations and other international institutions can play."

The first African American to hold the country's highest office, Obama has called for disarmament and worked to restart the stalled Middle East peace process. He is currently considering whether to increase troop numbers in Afghanistan where the US is mired in an eight-year-old conflict.

The prize worth 10 million Swedish crowns (£880,000) will be handed over in Oslo next month.