Tunisia fired its ambassador to the UN on Friday accusing him of failing to consult the foreign ministry on key issues that diplomatic sources said included Washington's controversial Middle East peace plan.

"Tunisia's ambassador to the United Nations has been dismissed for purely professional reasons concerning his weak performance and lack of coordination with the ministry on important matters under discussion at the UN," a foreign ministry statement said.

Diplomatic sources said that ambassador Moncef Baati, who has occupied a seat at the UN Security Council since the start of the year, had gone further than President Kais Saied wanted in his criticism of US President Donald Trump's long-delayed peace plan.

Saied, a political outsider who only took office in November after a surprise election victory, was concerned that Baati's expressions of support for the Palestinians risked damaging Tunisia's relations with the United States, the sources said. "It was quite a shock to hear that. I don't know all the details, the reason behind this," Ambassador Marc Pecsteen de Buytswerve of Belgium, which holds the rotating presidency of the Security Council, said of the sacking.

"He was a very good colleague and I really very much regret to see him leave," he added. Another diplomat and member of the Security Council, who did not wish to be identified, said that Baati was "the right person" to negotiate a resolution wanted by the Palestinians.

Baati's swift recall to Tunis meant that he missed a closed doors briefing of the Security Council on Thursday by the US plan's architect, Trump adviser and son-in-law Jared Kushner. After the briefing, Kushner blamed Palestinian president Mahmud Abbas for a spike in violence in Israel and the Palestinian territories since the plan was unveiled on January 28.

Abbas "calls for days of rage in response and he said that even before he saw the plan," Kushner told reporters in New York. Abbas is due at the UN next week to oppose the plan and demand adherence to international law.