Last week, protests in the capital Nairobi and other cities turned violent and one person was killed.
Police arrested more than 200 people, including lawmakers
belonging to Odinga's faction in both houses of the parliament.
Kenya's police chief on Sunday announced a ban on the fresh
protests called by Odinga, saying such acts remained illegal.
"We have been restraining ourselves. We cannot do that any
more. We are ready as the police force to maintain peace,"
Inspector General of Police Japhet Koome told reporters at a
media briefing.
During last week's protests police used tear gas and water
cannons, including at Odinga's convoy.
Odinga, 78, has called for the twice-weekly protests
indefinitely, citing the high cost of staples such as maize
flour, which has kept inflation high. He also accuses Ruto of
cheating in last year's presidential election.
Ruto said last week that the protests were hurting
businesses and ordinary people.
Odinga, a former prime minister, has lost five elections in
a row in his bid to be the president. He challenged the most
recent result before the Supreme Court, which upheld Ruto's
victory.
(Reporting by Humphrey Malalo and Ayenat Mersie; Writing by
Bhargav Acharya; Editing by Frank Jack Daniel)