WASHINGTON — United States intelligence agencies believe parts of the Ukrainian government authorized the car bomb attack near Moscow in August that killed Daria Dugina, the daughter of a prominent Russian nationalist, an element of a covert campaign that U.S. officials fear could widen the conflict.The American officials who spoke about the intelligence did not disclose which elements of the Ukrainian government were believed to have authorized the mission, who carried out the attack, or whether President Volodymyr Zelensky had signed off on the mission.- Crimean Bridge Explosion: Mr. Putin said that the strikes were retaliation for a blast that hit a key Russian bridge over the weekend.While the Pentagon and spy agencies have shared sensitive battlefield intelligence with the Ukrainians, helping them zero in on Russian command posts, supply lines and other key targets, the Ukrainians have not always told American officials what they plan to do.“We have other targets on the territory of Ukraine,” he said, “I mean collaborationists and representatives of the Russian command, who might have value for members of our special services working in this program, but certainly not Dugina.” Though details surrounding acts of sabotage in Russian-controlled territory have been shrouded in mystery, the Ukrainian government has quietly acknowledged killing Russian officials in Ukraine and sabotaging Russian arms factories and weapons depots."