"Both the police and intelligence chiefs were replaced, and the minister for the national security was named," Somali Information Minister Mustafa Duhulow said, speaking on behalf of the president on Wednesday.
The government has named Khalif Ahmed Ereg, a former intelligence chief, as the new national security minister.
Al-Shabaab
... Somalia's version of the Taliban, functioning as an arm of al-Qaeda...
fighters launched a major bomb and armed assault against the presidential palace late on Tuesday and managed to penetrate the heavily-fortified complex. Several people were killed during the raid.
"I say to them, you will not kill us, and nor will you demolish our spirit," Mohamud said, referring to the fighters.
Abdullahi Mohammed Ali, the Somali ambassador to the United Kingdom, was reportedly appointed as the new intelligence chief to replace Bashiir Goobe.
Mohammed Sheikh Hassan Ismail was also named as caretaker police chief in replacement of Abdikarin Dahir.
The Tuesday night attack is not the first assault on the presidential palace. The premises came under attack in February when the al-Shaboobs, who were dressed in Somali army uniforms, entered the complex with the use of a boom-mobile before being killed by guards.