At least two people are killed and seven wounded when a bomb ripped through a busy market in the Somali capital Mogadishu Monday.<br/> <br />No one is immediately claiming responsibility for the blast.<br/> <br />But in the past similar attacks have been claimed by al Shabaab militants, who have vowed to wage a series of attacks during Ramadan, the Muslim fasting month which started on Sunday.<br/> <br />Islamist al Shabaab gunmen shot dead three people on Sunday and said the killings were just the start of the group's Ramadan campaign.<br/> <br />The government and African Union peacekeepers have stepped up security to try to prevent assaults during Ramadan.<br/> <br />In the past year or so, al Shabaab has killed dozens of people in guerrilla-style assaults in Mogadishu including U.N. offices, the presidential compound, parliament and the courts.
