Smoke billows into the sky following a car bomb explosion at Somalia's education ministry . Reuters

"So far, people who died have reached 100 and 300 are wounded, and the number for both the death and wounded continues to increase," he said after visiting the bombing location.

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Two cars packed with explosives were detonated minutes apart near the busy Zobe junction, followed by gunfire in an attack targeting Somalia's education ministry.

A Somali soldier walks through the scene of a double car-bomb attack in Mogadishu, Somalia. AP

The afternoon explosions shattered windows of nearby buildings, sending shrapnel flying and plumes of smoke and dust into the air.

The attack took place at the same busy junction where a truck packed with explosives blew up on October 14, 2017, killing 512 people and injuring more than 290.

Mohamud described the incident as "history", saying "it is the same place, and the same innocent people involved."

"This is not right. God willing, they will not be having an ability to do another Zobe incident," he said, referring to the militant group Al Shabaab.

'All-out war'

The militants have been seeking to overthrow the fragile foreign-backed government in Mogadishu for about 15 years.

Rescuers remove a body from the scene of a double car-bomb attack in Mogadishu, Somalia. AP

Its fighters were driven out of the capital in 2011 by an African Union force but the group still controls swathes of countryside and continues to wage deadly strikes on civilian and military targets.

In August, the group launched a 30-hour gun and bomb attack on the popular Hayat hotel in Mogadishu, killing 21 people and wounding 117.

Mohamud, who was elected in May, vowed after the August siege to wage "all-out war" on the militants.