The attack on the upscale hotel complex at 14 Riverside, by at least four gunmen, began shortly after 3 p.m. on Tuesday with an explosion in the parking lot and then a suicide bomb blast in the foyer of the dusitD2 Hotel, police said. Somali militant group Islamist group al Shabaab claimed responsibility.
The 72-year-old Kenya's opposition leader Raila Odinga and his National Super Alliance (NASA) coalition believe he was the rightful winner, and that results which came in via an electronic tallying system were hacked and manipulated.
Voters formed long lines at many polling stations before dawn, waiting for the chance to cast ballots in the tightly contested race for the presidency as well as for more than 1,800 elected positions, including governors, legislative representatives and county officials.
The incident comes days before Kenya sees its presidential, legislative and regional elections. While President Kenyatta is seeking a second term, Ruto is his running mate. The elections are scheduled to take place on August 8 this year.