A desperate manhunt has been launched to find a terrorist who reportedly shouted 'Allahu Akbar' before shooting dead 39 people in an Instanbul nightclub packed with New Year's Eve partygoers.A further 69 people were injured as the killer stormed the Reina nightclub in Istanbul armed with an AK-47 and began blasting people at will.As many as 16 of those dead are thought to be foreign nationals.