On Sunday, Boko Haram militants in Nigeria murdered 19 motorists on a highway near the border with Cameroon.
From the details known so far, it would seem that just like the Al-Shabaab attack in Nairobi, this was a case of cold-blooded, pre-meditated murder.
Five of the dead were shot, while the rest were hacked to death.
The Westgate Mall attack may have received a lot of media attention, but similarly gruesome and senseless killings of civilians take place on a regular basis in too many parts of the continent.
To blame are always extremist groups that manage to cause death, destruction and suffering on a scale far greater than their usually dimunitive size would suggest.
This should serve as a reminder and warning for all countries on the continent to be ever-vigilant and to nip in the bud the growth of prospective terrorist groups, no matter how small they may seem to be at the moment.