Businessman Jimi Wanjigi is among guests attending the United Democratic Alliance delegates conference at the Kasarani stadium.
Wanjigi arrived at Kasarani a few minutes past noon on Tuesday, in the company of Chama Cha Kazi party leader Moses Kuria.
Speaking to the press, Wanjigi said he was there because of friendship
"Hakuna muungano, ni urafiki tu," he said.
This loosely translates to "there is no alliance, just friendship."
Wanjigi noted that he had been invited to the event.
UDA delegates on Tuesday unanimously endorsed Deputy President William Ruto as the party’s presidential candidate in the August 9 General Election.
The delegates endorsed Ruto after a closed door session.
The DP was accompanied by his wife Rachel.
Among the leaders present are Governor Anne Waiguru, UDA Secretary-General Veronica Maina, chairman Johnstone Muthama, Mathira MP Rigathi Gachagua and Kandara MP Alice Wahome.
