Umno's top two leaders have criticised the Federal Court for dismissing former premier Najib Abdul Razak's attempt to introduce new evidence in his final appeal against conviction.

In a statement last night, Umno president Ahmad Zahid Hamidi said his party was "saddened" by the apex court's decision.

"Umno will not interfere with court affairs. However, we believe that justice need not only be done but it must be seen to be done," said Zahid.

In a separate statement, party deputy president Mohamad Hasan said all evidence must be considered and not set aside on technical grounds.