An Egyptian militant group that has carried out months of deadly assaults on the police and the military has claimed responsibility for the bombing of a tourist bus that killed four people in the Sinai Peninsula on Sunday. The assertion by the group, Ansar Beit al-Maqdis, signaled an ominous turn in a battle militants have waged against the government since the military ouster of President Mohamed Morsi in July. The bombing, in the Sinai town of Taba, was the first attack against tourists in years. Three South Korean citizens and an Egyptian bus driver were killed. In a statement posted on jihadist websites late Monday, Ansar Beit al-Maqdis said that the bombing was part of an “economic war against this regime of traitors.” It said that one of the group’s “heroes” had carried out the attack, but did not say how. Egyptian officials have said a suicide […]