KABUL: Islamic State militants claimed responsibility for twin explosions on Saturday that ripped through crowds of Hazara community in Kabul, killing at least 61 people and wounding 207 others in apparently their deadliest attack in the Afghan capital.The scene of the attack was littered with charred bodies and dismembered limbs, with ambulances struggling to reach the scene as authorities had overnight blocked key intersections with stacked shipping containers to impede movement of the protesters.“The death toll has jumped to 61 and 207 others have been wounded,” Health Ministry spokesman Mohammad Ismail Kawoosi told AFP, adding that the toll could rise further. The wounded overwhelmed city hospitals, officials said, with reports emerging of blood shortages and urgent appeals for donors circulating on social media.The bombings during a huge protest over a power transmission line could deepen sectarian divisions in a country well-known for communal harmony despite decades of war. The Taliban, who are in the middle of their annual summer offensive and are more powerful than the IS group, strongly denied any involvement in the attack.It appears to be the single deadliest attack in Kabul to be claimed by IS militants, who are making steady inroads in the country, challenging the Taliban on their own turf. The attack came as thousands of demonstrators gathered to demand that a multi-million-dollar power line pass through their electricity-starved province of Bamiyan, one of the most deprived areas of Afghanistan with a large Hazara population. – ‘Horrific attack’ –“The horrific attack on a group of peaceful protestors in Kabul demonstrates the utter disregard that armed groups have for human life” Amnesty International said that in a statement.“Such attacks are a reminder that the conflict in Afghanistan is not winding down, as some believe, but escalating, with consequences for the human rights situation in the country that should alarm us all.” In a statement, Afghan President Ashraf Ghani said that he was deeply saddened by the carnage, adding that the casualties included security officials.“Holding protests is the right of every citizen of Afghanistan and the government puts all efforts to provide security for the protestors, but terrorists entered the protests, and carried out explosions that martyred and wounded a number of citizens including members of security forces,” the presidential palace said.The protest march was largely peaceful before the explosions struck as the demonstrators sought to march on the presidential palace, waving flags and chanting slogans such as death to discrimination. The 500-kilovolt TUTAP power line, which would connect the Central Asian nations of Turkmenistan, Uzbekistan and Tajikistan with electricity-hungry Afghanistan and Pakistan, was originally set to pass through the central province.But the government re-routed it through the mountainous Salang pass north of Kabul, saying the shorter route would speed up the project and save millions of dollars. Hazara leaders in the ethnically divided nation lashed out at the Pashtun president, calling the decision prejudiced against the Hazaras, a community that has suffered a long history of oppression.The three million-strong Hazara community has been persecuted for decades, with thousands killed in the late 1990s by Al-Qaeda and the mainly Pashtun Sunni Taliban.