KABUL, Afghanistan — Afghanistan claimed Sunday it killed a top al-Qaida propagandist on an FBI most-wanted list during an operation in the country’s east, showing the militant group’s continued presence there as U.S. forces work to withdraw from America’s longest-running war amid continued bloodshed. The reported death of Husam Abd al-Rauf, also known by the nom de guerre Abu Muhsin al-Masri, follows weeks of violence, including a suicide bombing by the Islamic State group Saturday at an education center near Kabul that killed 24 people.