In pictures: the World Islamic Economic Forum in London

The ninth World Islamic Economic Forum gathered the Islamic world's top leaders in London. Above, members of the media during the opening session of the Islamic finance event. Matthew Lloyd / Getty Images

The British prime minister, David Cameron, left, who delivered a keynote address to the forum on Tuesday, greets Salman bin Hamad Al Khalifa, the crown prince of Bahrain, right, while King Abdullah of Jordan looks on. Stephen Lock for The National

Afghanistan's president Hamid Karzai addresses the World Islamic Economic Forum, alongside Bangladeshi president Abdul Hamid. Luke MacGregor / Reuters

The British prime minister David Cameron gives a speech while Afghan president Hamid Karzai listens during the opening day of the World Islamic Economic Forum. Stephen Lock for The National

Pakistan's prime minister Nawaz Sharif addresses delegates during the ninth World Islamic Economic Forum in London. Sang Tan / AP Photo

Malaysia, where Najib Razak is the prime minister, is considered the hub of Islamic finance. Above, the prime minister addresses attendees to the World Islamic Economic Forum in London. Luke MacGregor / Reuters

Ahmad Mohamed Ali, the president of Islamic Development Bank, during the opening of the World Islamic Economic Forum. Bethany Clarke / Getty Images

The Sultan of Brunei Hassanal Bolkiah also delivered a speech at the opening of the World Islamic Economic Forum. Bethany Clarke / Getty Images

Salman bin Hamad Al Khalifa, the crown prince of Bahrain, is one of the Islamic leaders who attended the World Islamic Economic Forum. Sang Tan / AP Photo

Ahmad Mohamed Ali, the president of the Islamic Development Bank, deliver his speech at the opening day of the World Islamic Economic Forum. Stephen Lock for The National

More than 2,600 Muslim leaders of business and politics have gathered in London for the ninth World Islamic Economic Forum, the first to be held outside an Islamic country.