KUWAIT CITY (AFP) - Shia and Sunni MPs fought with fists in Kuwait's parliament Wednesday during a heated debate over inmates in the US Guantanamo detention centre, amid rising sectarian tension in the Gulf state. Parliament was holding a debate over two Kuwaiti detainees in the US prison camp in Cuba that Washington has refused to release when Shia MP Hussein al-Kallaf provoked some Sunni fellow MPs by dismissing the prisoners as "Al-Qaeda" militants. Chaos erupted when Jamaan al-Harbash of the Sunni Brotherhood told Kallaf the debate was not called to discuss Al-Qaeda but Guantanamo prisoners. Two Shia and four Sunni lawmakers were involved in the fight prompting acting speaker MP Abdullah al-Rumi to adjourn the session. Later, parliament speaker Jassem al-Khorafi, describing the unprecedented fight as "shameful", adjourned sessions until May 31 and ordered parliament's bureau to investigate. Independent MP Rudhan al-Rudhan called on the oil-rich emirate's ruler to use his constitutional powers to suspend parliament sessions for one month. Shia MP Adnan al-Mutawa, who received a cut under the eye during the scuffle, accused Sunni MPs of not believing in democracy, saying attacking opponent MPs physically "is a form of terrorism." The debate was attended by a delegation of US lawyers defending the inmates. During the debate, MPs called on the government to press the United States to free the two Kuwaiti inmates or complain to the International Criminal Court. The United States had already released 10 Kuwaitis from Guantanamo but has rejected all appeals from its staunch ally Kuwait to free the remaining two. Kuwait on December 1 disowned comments attributed to its former interior minister calling for the death of its nationals held at Guantanamo Bay. Former interior minister Sheikh Jaber was quoted by WikiLeaks as telling the US ambassador that his country did not want to see the return of the Kuwaiti suspects and suggested "the best thing to do is get rid of them." The exchange between Sheikh Jaber and the US envoy to Kuwait, took place in February 2009 and was recorded in a US State Department cable published by WikiLeaks. The Gulf country's foreign minister had insisted, however, that "it is impossible to think that Kuwait will ever forget about its sons ... detained in Guantanamo without trial." The fight came amid of heightened sectarian tension between the minority Shia community and the Sunni majority at the background of local and regional issues. Tensions soared when Shias and Sunnis clashed over dispatching Gulf troops to Bahrain to crush Shia-led protests and also after the uncovering of a spy ring allegedly working for the Revolutionary Guards in Shia Iran.