Police officer Abukar Mohamed told Xinhua news agency that a suicide bomber rammed the vehicle into the office of Hodan district causing casualties. The offices of the district were also destroyed by the explosion he added.
Witnesses described the blast as devastating. "I saw many people injured in the blast and many buildings destroyed " said one eyewitness Nur Farah.
Militant group Al-Shabab has claimed responsibility for the attack.
On September 2 the group launched a similar attack on Howlwadag headquarters killing at least three people.
--IANS soni/
