Malaysia’s former Prime Minister, Najib Razak, has returned to his residence in Kuala Lumpur to serve the remainder of his prison sentence under house arrest following his conviction in a multibillion-dollar corruption scandal.

The 73-year-old arrived at his home in an SUV escorted by a heavily armed police convoy, as journalists and media organisations gathered to witness his return.

His departure from prison marks the end of a four-year period behind bars over his conviction in connection with the embezzlement of billions of dollars from Malaysia’s state-owned 1MDB sovereign wealth fund.

The scandal, which came to light about a decade ago, contributed to the collapse of Najib’s government and attracted international attention, involving prominent figures in Malaysia, investment bank Goldman Sachs and Hollywood.

Investigators estimated that about 4.5 billion dollars was diverted from the fund, which Najib co-founded, into private accounts.

Prosecutors alleged that more than one billion dollars was transferred into accounts linked to the former prime minister.

Najib’s corruption case remains one of the most prominent financial scandals in Malaysia’s history.