Talks to reunify the divided island of Cyprus collapsed, Reuters reported quoting United Nations Secretary-General Antonio Guterres.

"I'm very sorry to tell you that despite the very strong commitment and engagement of all the delegations and different parties ... the conference on Cyprus was closed without an agreement being reached," UN  Secretary-General said.

The week of talks in the Swiss Alps, which the UN said was the "the best chance" for a deal, ground to a halt as the two sides failed to overcome final obstacles. 

Diplomats noted that Turkey had appeared to be offering little to Greek Cypriots wanting a full withdrawal of Turkish troops from the island, although the Greek Cypriots had indicated readiness to make concessions on Turkish Cypriot demands for a rotating presidency.

"Unfortunately... an agreement was not possible, and the conference was closed without the possibility to bring a solution to this dramatic and long-lasting problem," Guterres said.

"That doesn't mean that other initiatives cannot be developed in order to address the Cyprus problem," he added.

Guterres refused to specify what exactly led to the failure of the negotiations, noting that the sides still have great disagreements on a number of issues.