Soon after, a user on Facebook posted an announcement on a public Facebook group page with more than 91,000 members, asking for donations. A screenshot of the post has also been posted on the platform.
"TUMA Chochote uko nacho kwa hii number 0729481197 tusimame na familia ya Mzee mwai kibaki...na mungu atawabariki," the post reads in Kiswahili.
This translates as: "Send anything you have to this number 0729481197. Let's stand with the family of Mzee Mwai Kibaki ... and God bless you." The post includes a photo of Kibaki.
But is the fundraiser for his family legit?
No announcement of fundraiser by government or family
There has been no announcement of the fundraiser from the government. The president has said there will be a state funeral for Kibaki, at the government's expense. All former presidents in Kenya are entitled to a state funeral.
For more information, read our detailed guide on how to spot scams on Facebook.