A two-state solution to the Israeli-Palestinian conflict is more remote than ever, with the risk of generations of violence and radicalism unless leaders act, the United Nations’ most senior official in the region said on Wednesday.

It’s time for the international community and the leadership on both sides to wake up.

In his first public comments since the publication on July 1 of a report by the Quartet of Middle East mediators, the U.N.’s special coordinator for the region, Nickolay Mladenov, said the situation was approaching a point of no return.

“(The two-state solution) is perhaps the furthest away it’s ever been, and in fact it is really worse than that — it is slipping away as we speak,” he told Reuters in an interview, citing Israeli settlement building and Palestinian violence and incitement as among the most troubling obstacles.