MOGADISHU, Somalia—A prominent Somali female lawmaker is among at least 48 people killed in a suicide bombing that hit a polling station in rural central Somalia, police and a local official said Thursday. The attack took place late Wednesday in the town of Beledweyne, the capital of Somalia’s Hiran region. Among its victims was opposition lawmaker Amina Mohamed Abdi, an outspoken government critic who was campaigning to retain her seat in the National Assembly. The death toll rose dramatically from 15 to 48 as more victims of the attack succumbed to their wounds, Ali Gudlawe, president of Somalia’s Hirshabelle state, told reporters. He said 108 others were injured. Al-Shabab, Somalia’s Islamic extremist rebel group, claimed responsibility for the attack. The 15 people killed were “mostly civilians” and the attack wounded “an unspecific number” of people, police officer Ahmed Hassan told AP by phone. “I was at a walking distance to …