"Where there are issues of corruption I’m taking action on them and that is the reason why I’m appearing in court as a witness. It is one of the ways of fighting corruption." Murungi explained.

He laid the blame for rising prices on the rise in global petroleum prices as well as rising inflation in Kenya.

But for MP Joseph Nkaissery, the problem was not corruption, but Kenya’s coalition government and its ability to make decisions.

"Who is in charge of increasing this fuel? Is it not the government?" he asked. "Mr. speaker, this is a problem of leadership. And we warned this country. Never again - and I pray - never again, this country should never have a coalition government because we are stuck."

Prices of fuel in Kenya are determined by the country’s Energy Regulatory Commission, which last week announced another increase.

The impact is beginning to spread into other staple items such as flour and corn. According to the World Bank, corn prices in Kenya have jumped 27 percent in the last three months.

After protests hit cities across the country, Finance Minister Uhuru Kenyatta on Monday announced a 20 percent tax cut on diesel fuel to help stem rising costs. But consumer organizations in Kenya have panned the cuts as too little too late.