KUALA LUMPUR, Malaysia—Malaysian police said they seized the equivalent of more than $28 million in 26 different currencies in an empty apartment searched as part of an investigation into 1Malaysia Development Bhd., the troubled state investment fund founded by former Prime Minister Najib Razak.
Commercial-crime division chief Amar Singh said Friday that police searched several properties in an operation that began May 18, including apartments belonging to a son and a daughter of Mr. Najib, in addition to his personal residence....