In 1975, the Israel–South Africa Agreement was signed, and increasing economic co-operation between Israel and South Africa was reported, including the construction of a major new railway in Israel, and the building of a desalination plant in South Africa. In April 1976 South African Prime Minister John Vorster was invited to make a state visit, meeting Israeli Prime Minister Yitzhak Rabin. Later in 1976, the 5th Conference of Non-Aligned Nations in Colombo, Sri Lanka, adopted a resolution calling for an oil embargo against France and Israel because of their arms sales to South Africa. In 1977, South African Foreign Minister Pik Botha visited Israel to discuss South African issues with Israeli Prime Minister Menachem Begin and Foreign Minister Moshe Dayan.