NEW : Omar Nor reported from Mogadishu and Al-Shabaab 's claims responsibility ; says slain official worked with 'foreign ' spies . NEW : Sources : 8 people injured are treated at a Somalia hospital . In a separate bombing , a lawmaker 's car explodes but he is unhurt . Al-Shabaab mission includes turning Mogadishu into a fundamentalist African state .
NEW : Al-Shabaab 's claims responsibility ; says slain official worked with 'foreign ' spies . NEW : Sources : 8 people injured are treated at a Somalia hospital . In a separate bombing , a lawmaker 's car explodes but he is unhurt . Al-Shabaab mission includes turning Mogadishu into a fundamentalist African state .