Pakistan needs to use force to reassert government control in areas overrun by Islamist extremists and prevent them from invading the capital, analysts said. Armed militants have set up checkpoints and are occupying mosques in districts just 100 kilometres (60 miles) from Islamabad, posing what Washington has called a threat to the very existence of the nuclear-armed nation. "This policy of appeasement is not going to work because it gives time to the Taliban to consolidate," political analyst Anees Jillani said, referring to a peace deal struck between the government and the Taliban. "The government should also cut the arms supply line to the Taliban," he said The militants' move into Buner district northwest of the capital comes after Islamabad ceded control of the scenic Swat valley, allowing the Taliban to enforce traditional Islamic law, or sharia, in what was once the jewel of Pakistan's tourism industry. But analysts said the deal in Swat, reached after a bloody two-year insurgency, has simply allowed the Taliban to re-group, consolidate and expand control into other regions. "The government has to handle the Taliban the way the Sri Lankan government is handling the Tamil Tigers," Jillani said, referring to the end-game assault on anti-government rebels by Sri Lanka's army in that country's north. The Taliban takeover in Buner is evidence that the group's strategy of intimidating police and officials is working because of the fundamental weakness of President Asif Ali Zardari's government, the analysts said. "This government lacks the ability to take decisions, there is no clarity of thought needed to take tough decisions," said Hamid Nawaz, a former interior minister and political analyst. "Talibanisation is a big problem -- you have to have a clear head and national resolve to overcome this problem," he said, adding that Islamabad needed to take back control from the Taliban. "Swat should be sanitised and the government should focus on reinforcing law enforcement agencies in the region. "No preventive measures to stop the Taliban from moving to other areas... were taken after signing of the deal," Nawaz said. "The government has also not worked out any contingency plan. A ceasefire will always work in the insurgents' favour." The Taliban's growing control in Swat has raised the spectre of an invasion of Islamabad. For Zafarullah Khan, director of the independent Centre for Civic Education, the unwillingness of the military to halt the advance of the Taliban poses a threat to Islamabad. "When security forces refuse to contain them, how can these militants be stopped?" said Khan. "It is a question of commitment and capacity. They do not have capacity and that is diluting the commitment also," he said. Washington has said Pakistan's leaders need to take decisive action to defeat the militants who threaten the country's stability. President Barack Obama has put Pakistan at the centre of the fight against Al-Qaeda as the US sends reinforcements to neighbouring Afghanistan. "The stability and the longevity of democratic government in Pakistan is central to the efforts of the coalition in Afghanistan," US Defence Secretary Robert Gates said Thursday. Pakistan's newspapers have encouraged the army to take a tough stance, or invite foreign intervention to put a stop to growing Taliban influence. "It is the army that has to step forward and face the Taliban. It has baulked so far because of adverse public opinions and equally lethal media tilt," the Daily Times said in its editorial. "Swat is the challenge staring us in the face. If we do not accept it and fight the Taliban, then the world will have to come and fight it the way it thinks fit." The News said Prime Minister Yousuf Raza Gilani had to take control. It said his rejection in a recent television interview of concerns raised by the US special envoy to Pakistan and Afghanistan was not good enough. "Mr Gilani, it is not just Richard Holbrooke is who worried, most Pakistanis are greatly worried about this threat," said the paper. "You and your government had better to do something to assure them that you and your government -- and the military -- are serious in combating it."