Officials said that the attack near the town of the region, according to reports reaching us from there.
The source added that the blast took place near the Kismayo police station.
Witnesses in Kismayo say the blast was a suicide bomber who detonated his explosives, while other reports say the blast was caused by a roadside bomb.
The security forces of the Jubbaland administration have cordoned off the area where the blast took place and are conducting investigations. No casualties have been reported so far.