A bomb in a mosque killed a provincial governor Tuesday in the highest profile assassination in recent months, part of an intensified campaign to intimidate Afghanistan’s administration as it prepares for elections and the withdrawal of foreign troops after 12 years of war. The bomb killed Gov. Arsallah Jamal of eastern Logar province as he delivered a speech at the main mosque in the provincial capital of Puli Alam to mark the Muslim holiday of Eid al-Adha. The attack also wounded 15 people, five of them critically, said his spokesman, Din Mohammad Darwesh.