CRANS-MONTANA, Switzerland: United Nations chief Antonio Guterres arrived in Switzerland on Friday to give a boost to pivotal talks aimed at reuniting the Mediterranean island of Cyprus after more than four decades of bitter division. Guterres joins the negotiations in the Swiss Alpine resort of Crans-Montana as rival Cypriot leaders are under intense international pressure to strike a deal. A source close to the talks said Guterres would ask Greek and Turkish Cypriot leaders to take “big and bold” decisions at the summit, which has been billed as the best chance for lasting peace on the island.”We hope the secretary-general can play a catalytic role in encouraging the sides to finally resolve one of Europe’s last frozen conflicts,” the source told Agence France-Presse. Cyprus, an EU member, has been divided since 1974 after Turkish troops invaded the island following an Athens-inspired coup attempt seeking a union with Greece. The northern third later declared itself a separate territory, a move that has been recognized only by Ankara.