JERUSALEM, Sept. 1 (Xinhua) -- The Israeli and Palestinian chief negotiators met on Saturday evening in Jerusalem under secrecy, Israel Radio reported on Sunday evening.

The report quoted a Palestinian official as saying that Tzipi Livni and Saeb Erekat "discussed all the main issues but have yet to reach any understandings."

The official noted that the two are scheduled to meet again on Tuesday, adding that the Saturday meeting did not include Martin Indyk, U.S. envoy to the Middle East.

In recent weeks, Israel and the Palestinians have met under secrecy, without any press briefings, public statements or even announcement about the meetings.

A possible reason for the silence surrounding the talks, which commenced on July 30 in Washington after a three-year halt, is a desire to quiet down objectors over Israel's recently announced plans to build more than 1,600 new housing units in the West Bank and east Jerusalem, on the territories annexed during the Mideast 1967 War.

The decision put a question mark on the future of the peace talks, which came to a halt in 2010 over a dispute on Israeli settlement activities in the West Bank.

Two weeks ago, Army Radio reported that Indyk and other U.S. officials urged Palestinian President Mahmoud Abbas to keep the negotiations alive despite Israeli settlement activities.