Civilians and Somalian security officers gather at the scene of a suicide car bomb at a street junction near the president s residence, in Mogadishu, Somalia, AP
A "desperate terrorist" blew himself up on Sunday morning near a line of new recruits who were enrolling at the Nacnac military base in the south of the Somali capital, local military commander Abdullahi Adan told AFP.
"Seven people were killed and nine others injured," he said.
"I was close to the site of the explosion, it was huge and I could see dead and injured people," eyewitness Ahme Gobe told AFP.
Another eyewitness, Asha Omar, spoke of seeing at least 10 people taken away by ambulance.
Al-Shabaab, an extremist Islamist group linked to Al-Qaeda that has been waging an insurgency against the Somali state for 15 years, claimed responsibility for the attack.
Its fighters killed at least 19 civilians in central Somalia earlier this month.
The group carried out a major attack on a Mogadishu hotel in August, leaving 21 people dead and 117 injured following a 30-hour siege.
Somali President Hassan Sheikh Mohamud has faced a resurgent Al-Shabaab since his election in May and vowed to wage an "all-out war" against the insurgents.
Mohamud also has to grapple with a looming famine caused by the Horn of Africa nation's worst drought in 40 years.
Al-Shabaab has been driven out of Somalia's urban centres, including Mogadishu in 2011, but remains entrenched in vast swathes of the countryside.
The US army on Wednesday said it had killed 27 Al-Shabaab militiamen in an air strike in central Somalia in support of the country's regular forces.
President Joe Biden decided to restore a US military presence in Somalia in May to fight the militants, approving a request from the Pentagon, which deemed his predecessor Donald Trump's rotation system too risky and ineffective.