Israeli Prime Minister Benjamin Netanyahu, left, talks with Palestine's president Mahmoud Abbas before a group photo as part of the COP21, United Nations Climate Change Conference, in Le Bourget, outside Paris, Monday, Nov. 30, 2015. More than 150 world leaders are meeting under heightened security, for the 21st Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP21/CMP11), also known as "Paris 2015" from November 30 to December 11. (Martin Bureau/Pool Photo via AP)

Israeli Prime Minister Benjamin Netanyahu, left, talks with Palestine’s president Mahmoud Abbas before a group photo as part of the COP21, United Nations Climate Change Conference, in Le Bourget, outside Paris, Monday, Nov. 30, 2015. (Martin Bureau/Pool Photo via AP)

Israel’s prime minister and the Palestinian president, in France for the climate summit, met and shook hands for the first time in years.

A photograph shows Benjamin Netanyahu and Mahmoud Abbas shaking hands and smiling on the sidelines of global climate talks outside Paris on Monday. It was not immediately clear if they had agreed to meet or if they spoke.

US mediated peace talks between the sides collapsed early 2014 and the two leaders have not met in years.

The two met at the COP21, United Nations Climate Change Conference, in Le Bourget, outside Paris, Monday.

More than 150 world leaders are meeting under heightened security, for the 21st Session of the Conference, also known as “Paris 2015” from November 30 to December 11.