 A bomb planted on a bus carrying soccer players in Somalia's port city of Qesmaio killed at least five players a police officer said on Friday. It was not immediately clear who was behind the attack on Friday evening. President Mohamed Abdelahi Mohamed's office Twitter account said the president had sent condolences and put the blame on al-Qaeda-linked al-Shabaab insurgents for the explosion. Al-Shabaab, which wants to unseat the central government and impose its harsh interpretation of Islamic Sharia law, frequently carries out gun and bomb attacks in the Horn of African Nations.