Which ethnic groups were most involved in the violence following Kenya’s 2007 election?

The violence that followed Kenya’s 2007 election involved several of the country's ethnic groups, most notably the Kikuyu (the group associated with President Mwai Kibaki), the Kalenjin, and the Luo (the group associated with Raila Odinga).12

It is important to note that all three of these groups were both victims and perpetrators during the unrest. The widespread violence, which resulted in more than 1,000 deaths and the displacement of approximately 600,000 people, was a tragic failure of political stability that caused immense human suffering.123