U.N. experts say Yemen's former president Ali Abdullah Saleh is alleged to have amassed assets worth between $32 billion and $60 billion, most believed to have been transferred abroad under other names.

The experts, who monitor U.N. sanctions ordering all countries to freeze the assets of Saleh and two Houthi rebel leaders, said the ex-president's assets are believed to include property, cash, shares, gold and other valuable commodities in at least 20 countries.

The report to the U.N. Security Council, circulated Wednesday, noted that Saleh was in power for 33 years and had many years to hide his assets, especially after the possibility of sanctions against him was raised nearly a year ago. The panel said five prominent Yemeni businessmen are believed to have helped him.