UNITED NATIONS Secretary-General Ban Ki-moon on Saturday discussed with leaders of Turkey and Israel "options for moving forward with the investigation" called for by the UN Security Council following the deadly Israeli attack on Gaza-bound aid ships, killing nine peace activists, a U.N. statement said Sunday. The statement gave no details of the UN chief's talks with prime ministers Recep Tayyip Erdogan of Turkey and Benjamin Netanyahu of Israel, except to say that he will continue to consult concerned parties and 15 council members. But media reports quoting an Israeli official in Jerusalem, said Ban had proposed a multi-national investigation by a panel that would be headed by former New Zealand prime minister Geoffrey Palmer and include representatives from Turkey - under whose flag the ship sailed - Israel and the United States, said the official. The Israeli prime minister was planning to convene senior cabinet ministers on Sunday to discuss whether Israel would take part, the unnamed Israeli official said. Israeli leaders have spoken publicly about setting up an Israeli investigation with foreign observers into the interception of the Turkish-flagged Mavi Marmara last Monday. Israel's navy again boarded a ship carrying aid to Gaza on Saturday. Its interception of the MV Rachel Corrie ended without violence after diplomatic efforts to avoid bloodshed. After Monday's incident, Turkey's relations with Israel, once a close ally, soured badly. The Israeli official said the hope was that co-operation between Israel and Turkey in a committee would help mend ties. Participation of Israel's main ally the United States could address Israeli concerns about the panel's impartiality, reports from Jerusalem said. The Security Council on 1 June condemned the acts that led to the deaths of nine civilians after the Israeli military intercepted a convoy of aid ships bound for Gaza, calling for a prompt, impartial, credible and transparent investigation. Dozens of other people were wounded when Israeli forces took control of the six-ship flotilla in international waters, according to press reports. The convoy was said to have been carrying educational, medical and construction materials, as well as hundreds of activists from different countries. In a presidential statement, the council said that it deeply regrets the loss of life and injuries resulting from the use of force during the Israeli military operation in international waters against the convoy sailing to Gaza.