Malaysia, Aug. 19 -- The second trial of Malaysian's ex-Prime Minister Najib Razak linked to the multibillion-dollar looting of the 1MDB state investment fund was delayed Monday by a week to allow his first trial to end.

Najib faces a total 42 charges of corruption, abuse of power and money laundering in five separate criminal cases brought since his shocking election defeat last year. Najib, 65, denies wrongdoing and accuses the new government under Prime Minister Mahathir Mohamad of seeking political vengeance.

Chief prosecutor Gopal Sri Ram said the last witness in Najib's first trial is midway through testifying and the case should end this week. The first trial began in April on seven charges of criminal breach of trust, corruption...