Heavy mortar exchanges have since erupted in the Bakara market area of Mogadishu, A spokesman for the al Shabab terrorist group claimed the suicide attack was in retaliation for the killing of a wanted senior al-Qaida operative in the region.

VOA: standard.2009.09.17

Renamo said it launched the attack in retaliation for the police raids on meetings they were holding in the towns of Gondola and Muxungue.

BBC: Mozambican ex-rebels Renamo in police clash

According to the BBC, Spamhaus said the attack was in retaliation for its blacklisting of the Dutch company.

WSJ: Cyberattack on Spam Fighter Said to Be Over

The US military said it did not believe the attack was in retaliation for the incident with the wedding party.

BBC: US team probes Afghan wedding raid