The Kuwaiti cabinet walked out of a parliamentary session Tuesday over a plan by opposition MPs to quiz the finance minister on alleged financial and administrative irregularities.

The move came as the opposition-dominated parliament was about to vote on a proposal to merge two grillings, a step strongly rejected by the government on legal basis.

Foreign Minister Adnan Mansour held talks on Tuesday with diplomats of three Gulf countries that have called on their citizens to leave Lebanon in his ongoing effort to persuade them to review their decisions.

The current security tension in Lebanon is provisional and does not require such decisions, Mansour reportedly told the ambassadors of the United Arab Emirates, Qatar and Kuwait.

Saudi Ambassador to Lebanon Ali Awadh Asiri on Monday noted that the kingdom “is closely following the developments” in Lebanon, adding that Riyadh would only issue a travel warning should it feel that its citizens are in possible danger.

“Should we feel that our citizens are in danger, we will take the right decision, but right now we are closely following the developments,” Asiri told reporters following talks with Prime Minister Najib Miqati at the Grand Serail.

Kuwait advised its citizens on Monday to avoid travel to Lebanon and its nationals currently present in the country to leave due to the unstable security situation.

“The Kuwaiti authorities call on its citizens not to travel to Lebanon amid the tense security developments in the country,” the official KUNA news agency said.

Gulf monarchies must respect human rights, freedom of expression and allow for popular participation before turning the six-nation council into a union, Kuwait's parliament speaker said on Thursday.

"It is inevitable that the Gulf Cooperation Council (GCC) states will have no choice but to improve their relations to an advanced form of a union," Ahmed al-Saadoun said on his Twitter account.

Kuwait's ex-premier Sheikh Nasser Mohammed al-Ahmed Al-Sabah refused to appear before a parliamentary panel probing alleged graft against him, saying the summons issued to him were illegal.

In a letter, a copy of which was seen by Agence France Presse on Tuesday, Sheikh Nasser said the parliamentary panel had no authority to summon a former premier as it can only question ministers and government employees.

Liberal civil society groups in Gulf States called Monday on Saudi and Bahraini leaders to postpone plans to announce a union between them, saying such a step must be preceded by a referendum.

"We urge the Saudi and Bahraini leaderships to review such a step and calculate the reactions of the two peoples," the Gulf Forum for Civil Societies said in a statement signed by its secretary general Anwar al-Rasheed.

Gulf leaders will discuss a proposal for a closer political union among them that could begin with Saudi Arabia and Bahrain, the Bahraini information minister said on Saturday.

"The idea of a Gulf union will be on the agenda of the summit in Riyadh" on Monday, said Samira Rajab.

A Kuwaiti special judicial tribunal decided on Thursday to end its inquiry into graft allegations against the former prime minister citing a lack of evidence, a lawyer told AFP.

"I was notified this morning by the ministers' trial court that it closed its investigation into the case," said Nawwaf al-Fuzai, who filed the complaint several weeks ago.

Kuwait's current and former prime ministers have been questioned by parliamentary and judiciary committees probing graft allegations, a leading MP and local media said on Sunday.

Prime Minister Sheikh Jaber Mubarak al-Sabah, who was appointed in December, was questioned Saturday night by a parliamentary panel probing alleged illegal money transfers by his predecessor, head of the panel MP Faisal al-Muslim said.