NICOSIA, Cyprus (AP) — Crucial talks being held at a Swiss resort aiming to reunify the ethnically divided Cyprus have reached an impasse, officials said Monday, casting serious doubts about whether 18 months of negotiations can successfully resolve the decades-old dispute. A U.N. statement said Cypriot President Nicos Anastasiades, a Greek Cypriot, and breakaway Turkish Cypriot leader Mustafa Akinci have failed to narrow differences on the territorial aspect of a deal over two days of negotiations at Mont Pelerin, Switzerland.