Opposition leaders Kalonzo Musyoka and Moses Wetang’ula will take to the streets by June if the President will not have taken concrete action against the kingpins of corruption.
They accused President Uhuru Kenyatta of engaging in theatrics and waging a cosmetic war on graft.
Kalonzo said Kenyans want to see action against those stealing public funds meant for development.
"We want to see these thieves being put behind bars and not mere rhetorics and threats from the Head of State," Kalonzo said on Sunday during a fundraiser at Mukhweya Catholic church in Kabuchai constituency, Bungoma County.
The Wiper leader said he and Wetang'ula, the Ford Kenya leader, are professionals in organising demonstrations and will not fear calling for mass action if Uhuru does not take swift action.
He said the DCI and EACC should be given humble time to handle graft cases without intimidation.
"Let this Jubilee regime be warned that if by June, no serious action will have been taken on some corrupt individuals who are publicly known, me and my brother Weta will organise protests from Kitui to Kakamega, Bungoma to Mombasa and all parts of this country," Kalonzo said.
The former vice-president accused Uhuru of issuing statements on graft with no action being taken.
"Life has become unbearable for Wanjiku who is struggling very hard to put food on the table yet there are people who have stolen public money and are out there walking scot free."
Last Friday, Uhuru said he will spare no one, whether brother, sister or closest political ally, in the war on corruption.
Wetang’ula said the fight against graft was not targeting one community.
The Bungoma senator said jobs distribution in ministries and parastatals is skewed and favoured a few communities.
He said those targeted in the graft war are top government officials mainly from one community. "If your count top managers from the Luhya community in parastatals, they can't be five," he said.
The senator said that graft has been a thorn in the flesh for many Kenyans who want action done.
The two leaders criticised Deputy President William Ruto for denying Kenyans had died of hunger and asked the government to deal with the hunger.
Present were Bungoma Governor Wycliffe Wangamati, Woman Representative Catherine Wambilianga, MPs Wafula Wamunyinyi (Kanduyi), James Mukwe (Kabuchai) and Didmus Barasa (Kimilili).