Tunisia on Tuesday mourned eight soldiers slain by militants as appeals from the Islamist-led government for unity and the calling of a December election failed to quell violent protests. Prime Minister Ali Larayedh reiterated that his government would not resign, telling the Wataniya 1 state television channel he was opposed \"to this government stopping work\". The soldiers were found on Monday, their throats slit after they were ambushed by an armed group in Mount Chaambi near the Algerian border where the army has been tracking Al-Qaeda militants. The brutal killings triggered protests in the nearby eastern city of Kasserine, where demonstrators ransacked the local office of the ruling moderate Islamist Ennahda party overnight, an AFP correspondent reported. That incident came despite calls by President Moncef Marzouki for national unity and after Larayedh, an Islamist, announced a general election for December. The election is seen as a concession aimed at appeasing a growing mood of rebellion in Tunisia, where emotions have run high since Thursday\'s assassination of a prominent opposition MP. Many Tunisians want the government to go, believing it is responsible for the murder of Mohamed Brahmi -- the second opposition figure killed since February. The North African nation, cradle of a wave of popular uprisings that swept the region, has been rocked by almost a week of violent anti-government protests. Interior Minister Lofti Ben Jeddou told a Mosaique FM radio he wanted to see a unity government as soon as possible. \"I considered handing in my resignation along with other security officials but in light of developments I decided to stay until the formation of a government that includes all the parties, and which will overcome their selfishness in order to meet the challenges and combat terrorism,\" he said. On Monday, Larayedh defiantly insisted his government would stay put, telling state television \"this government will stay in office.\" \"We are not clinging to power, but we have a duty and a responsibility that we will exercise to the end,\" he said, proposing instead a general election for December 17. On Tuesday, Ennahda and several smaller parties moved to defuse the crisis by proposing that the ruling coalition be enlarged. \"We call for the constitution of a broad national coalition to put into effect the objectives of the revolution\" that overthrew veteran strongman Zine El Abidine Ben Ali in 2011, a declaration said. The signatories affirmed their \"attachment to consensus and dialogue\" and called for \"widening the political base of power.\" Larayedh said he favoured enlarging the existing coalition. \"Talks could focus on the formation of the government and move towards its enlargement,\" he said. \"When I formed the government (in March), I had proposed a government of national unity,\" Larayedh said of talks that foundered as the opposition thought Ennahda wanted too much of a monopoly. Ennahda coalition partner Ettakatol and the 500,000-strong General Union of Tunisian Labour (UGTT) separately called for a new government. However, the powerful UGTT, a key player in the 2011 uprising did not back the call by thousands of protesters who have demonstrated nightly outside the National Constituent Assembly calling for its dissolution. Just hours after Larayedh spoke on Monday, officials announced the death of the soldiers near the Algerian border. State television ran pictures of the mutilated corpses of the victims, some of whom had their throats cut and had been stripped of their uniforms and weapons. In a televised address, Marzouki, the secular president who is allied to Ennahda, called for national unity after the soldiers\' deaths as his office declared three days of national mourning. \"If we want to face up to this danger we have to face up to it united,\" he said. \"I call on the political class to return to dialogue because the country, society, is under threat.\" Since Brahmi\'s death, some 60 deputies have boycotted the assembly, which is drawing up the new constitution. The government and UGTT stressed that deputies must return to work and vote on the much-delayed constitution, one of the thorniest issues in post-revolution Tunisia. \"We think that the National Constituent Assembly will complete the electoral code by October 23 at the latest so elections can be held on December 17,\" Larayedh has said. It was on that day in 2010 that fruit vendor Mohamed Bouazizi set himself on fire in the town of Sidi Bouzid, beginning the revolution that ended Ben Ali\'s 23-year grip on power.