Palestinian President Mahmud Abbas said Thursday there could be no peace in the Middle East without a two-state solution.

"Those who think that peace can prevail in the Middle East without the Palestinian people enjoying their full, legitimate national rights would be mistaken," Abbas told the UN General Assembly.

The 87-year-old leader made a new appeal to UN Secretary-General Antonio Guterres to call an international conference on creating a Palestinian state.

A UN conference "may be the last opportunity to salvage the two-state solution and to prevent the situation from deteriorating more seriously and threatening the security and stability of our region and the entire world," Abbas said.