Protesters took to the streets of the capital, Nairobi, and several other cities in response to a call for demonstrations by opposition leader Raila Odinga.
Some lit fires in the streets and threw rocks at police. Police fired tear gas and water cannons, including at Odinga's convoy as he addressed supporters from the sunroof of his car.
The person killed, a student at Maseno University in western
Kenya, was shot in the neck by the police when officers fired
live rounds after running out of tear gas canisters and blank
rounds, according to a police report seen by Reuters on Tuesday.
A spokesperson for Kenya's National Police Service was not
immediately available for comment.
The report said the officers were confronting students who
had set fires in the road and vandalised local businesses.
Odinga, 78, cited the high cost of staples such as maize
flour, which have kept inflation high, in calling for protests.
He also accuses Ruto of cheating in last year's presidential
election, in which Odinga finished runner-up.
Odinga challenged the result last year before the Supreme
Court, which upheld Ruto's victory.
At least four members of parliament were arrested during the
protests. They were released on bail and will appear in court on
Thursday to answer charges of unlawful assembly, their lawyer,
Danstan Omari, told Reuters.
Odinga called on Monday for the protests to be repeated
weekly.
(Writing by Elias Biryabarema; Editing by Aaron Ross and Gerry
Doyle)