Twenty-two people were killed in Tuesday's protests in Kenya, a state-funded rights organisation said, vowing an investigation into what it described as "the largest number of deaths (in) a single day protest."

"We have recorded 22 deaths... we are going to launch an inquiry," said Roseline Odede, chairwoman of the Kenya National Commission on Human Rights, adding that 19 people had died in the capital Nairobi, where police opened fire at demonstrators who stormed parliament.