TEHRAN (AFP) - The Nobel Peace Prize won by US President Barack Obama on Friday should prompt him to start working toward ending injustice in the world, an aide to Iranian President Mahmoud Ahmadinejad told AFP.

"We hope that this gives him the incentive to walk in the path of bringing justice to the world order," said Ali Akbar Javanfekr, Ahmadinejad's media aide.

"We are not upset and we hope that by receiving this prize he will start taking practical steps to remove injustice in the world."

In particular, Javanfekr outlined two areas where he said Obama must act to prove he is worthy of the prize.

"If he removes the veto from the United Nations Security Council, then it shows the prize was given correctly to him," Javanfekr said.

Since first taking office in 2005, Ahmadinejad has called for an end to the veto power that the United States and the four other permanent members of the security council have over that body's decisions.

Javanfekr also said Obama "has to say what he has done to narrow the gap between the haves and have nots in the United States and in the nations under US influence.

"He must also show "that the United States has decided not to throw away its wheat surpluses but give them to African nations."