Al-Shabaab... hopes to topple the leadership and turn the country into a fundamentalist Islamist state.
MORE: http://www.cnn.com/2013/12/06/world/africa/somalia-violence/index.html
See also...
7 killed in car bomb attack on military convoy in Somalia
http://www.cnn.com/2013/12/05/world/africa/somalia-violence/index.html