Shebab gunmen kill Somali lawmaker and his guards

Mogadishu (AFP) - Somalia's Shebab insurgents assassinated a lawmaker and his guards, the president said, hours after US President Barack Obama said the Al-Qaeda affiliated militants had been "weakened".

Gunmen sprayed the car of MP Abdulahi Hussein Mohamud with gunfire as he travelled through a southern district of the capital Mogadishu earlier Saturday, killing him, his two guards and the driver.

President Hassan Sheik Mohamud said he was "devastated" at the attack, the latest in a string of murders of Somalia's lawmakers.

"The lawmaker was martyred while serving the nation, but such killings will not deter us from going forward," Mohamud told reporters.

The Shebab said in a statement that their "mujahedeen fighters targeted and killed a member of the parliament and his guards", adding that they "will continue targeting" lawmakers.

The Shebab have carried out repeated attacks including a campaign of suicide attacks and assassinations targeting government figures.

UN envoy to Somalia Nicholas Kay called the murders a "despicable act".

Witnesses said the militants fled after the attack.

"They opened fire on the car of the lawmaker and all of the passengers including him died," witness Abdirahman Mire said.

The Shebab is fighting to overthrow Somalia's Western-backed government which is propped up and protected by the 22,000-strong African Union force (AMISOM).

- Civilians killed -

The attack came as Obama, on a visit to neighbouring Kenya, praised AMISOM's efforts, but said while the insurgents had been "weakened", the overall security threat posed by the group remained.

"We have been able to decrease their effective control within Somalia and have weakened those networks operating here in East Africa. That doesn't mean the problem is solved," Obama said.

"We can degrade significantly the capacity of the terrorist organisations, but they can still do damage," he added.

Somali government troops backed by African Union forces last week launched "Operation Jubba Corridor" -- an offensive it said was aimed at flushing the insurgents out of rural areas in southern Somalia in an operation involving Ethiopian and Kenyan forces.

Deployed to Somalia since 2007, AMISOM has helped push back Shebab across much of the country's south, retaking towns and territory the group had held for years. US drone strikes have also taken their toll on Shebab, killing senior commanders, including the group's leader Ahmed Godane in September.

On Saturday, there were reports of helicopters -- believed to be from Ethiopia -- carrying out airstrikes targeting Shebab fighters in the southern Bay region.

Government officials said the attacks had killed several Shebab fighters, but residents said civilians had also been killed.

"Al-Shebab are defeated, and they are forcing the civilians to flee with them in order to use them as human shields," said local government official Abdirahman Mohamed, adding he had no reports of civilian deaths.

But residents around the forests of Dolondole said a truck carrying civilians fleeing the fighting had been blown up.

"A missile struck a truck and six civilians including two children died, I saw seven others who were seriously wounded," said local resident Mohamud Sheik Mumin. Other witnesses said civilians had been killed.

The deaths on Saturday follow witness reports earlier in the week in the southern Bakool region of dozens of civilians killed.