Malaysia's largest lender Maybank on Friday announced plans to expand its Islamic finance business in Singapore and Indonesia to tap the markets' demand for such services. In Indonesia, home to the world's largest Muslim population, the bank will open at least one new branch a week to increase its network. Maybank chief executive Abdul Wahid Omar is also planning to expand its Islamic services in Singapore, whose population is 13 percent Muslim. Maybank is determined to become the number one Islamic bank in ASEAN. Maybank is aiming to break into the world's top 10 Islamic finance centres, Abdul Wahid said. Bank Melli Iran is the global leader in Islamic finance.