Prime Minister Manmohan Singh left the South African shores today after a four-day visit that resulted in deepening bilateral strategic ties and securing support for India's case for nuclear fuel supplies.Besides participating in the centenary celebrations of the Satyagraha movement, Singh held intensive discussions with South African President Thabo Mbeki on issues relating to international terrorism, UN reforms, India's need for nuclear energy as well as ways and means of enhancing bilateral trade ties.After talks with the Prime Minister yesterday, Mbeki announced that South Africa supported India's case for nuclear fuel supplies.