Please answer a question about the following article about Somalis:

On 15 October 1969, while paying a visit to the northern town of Las Anod, Somalia's then President Abdirashid Ali Shermarke was shot dead by one of his own bodyguards. His assassination was quickly followed by a military coup d'etat on 21 October 1969 (the day after his funeral), in which the Somali Army seized power without encountering armed opposition essentially a bloodless takeover. The putsch was spearheaded by Major General Mohamed Siad Barre, who at the time commanded the army.

Who assassinated Abdirashid Ali Shermarke?
one of his own bodyguards