As Uhuru Kenyatta mounted a political comeback by campaigning against corruption, his family’s secret fortune was growing offshore, a massive new leak shows.

At his annual State of the Nation address last fall, President Uhuru Kenyatta mounted the podium at Kenya’s Parliament to acknowledge that too many Kenyans live in poverty and too many officials loot the country’s public resources.

The son of Kenya’s first president and leader of one of Africa’s largest economies, the 59-year-old Kenyatta urged lawmakers to join him in fighting corruption and yet again declared “the centrality of transparency, accountability and good governance as the anchors of sustainable development.”

But a massive cache of newly leaked documents show that Kenyatta’s family has for years been secretly accumulating a personal fortune behind offshore corporate veils.

Kenyatta, along with his mother, sisters and brother, have for decades shielded wealth from public scrutiny through foundations and companies in tax havens, including Panama, with assets worth more than $30 million, according to records obtained by the International Consortium of Investigative Journalists and shared with more than 600 reporters and media organizations around the world.

The records – from the Panamanian law firm Aleman, Cordero, Galindo & Lee (Alcogal) – show that the family  owned at least seven such entities, two registered anonymously in Panama and five in the British Virgin Islands. One BVI company owned a home in central London, according to the records, and two other companies held investment portfolios worth tens of millions of dollars. The Kenyattas’ offshore wealth, revealed here for the first time, represents part of an estimated half-billion-dollar family fortune amassed in a country where the average annual salary is less than $8,000 a year.

The family began to accumulate much of its offshore wealth while Uhuru Kenyatta was a rising political star. Two offshore companies were created during an investigation into alleged looting of the public treasury during the watch of President Daniel arap Moi, Kenyatta’s former political patron.

Under Kenyan law, the president must provide a list of financial interests to the Ministry of Finance each year. Kenyatta and his family members did not respond to requests for comment, including whether he declared any offshore interests or was required to do so.

Details of the Kenyatta family’s offshore wealth have been brought to light by the Pandora Papers, a collection of more than 11.9 million records from 14 law firms and other service providers based in the United Arab Emirates, the Seychelles, Panama, Singapore and other tax havens.

The investigation has revealed assets of 35 current or former world leaders, including the king of Jordan, the prime minister of the Czech Republic, and Kenyatta’s fellow African leaders Ali Bongo Ondimba of Gabon and Denis Sassou-Nguesso of the Republic of Congo.