Somali security forces said Tuesday they have arrested seven al-Shabab terrorists who had earlier hurled grenades on several police stations in Mogadishu, the capital of Somalia. Abdifitah Aden Hassan, a police spokesman, told the State-run Radio Mogadishu that al-Shabab militants attacked Wadajir, Hodan, Hawl-wadaag and Bondhere police stations in Mogadishu…