Kenya's opposition says the new power-sharing Cabinet will not be announced as expected on Sunday.
A spokesman for opposition leader Raila Odinga said Saturday that issues about the make-up of the Cabinet have not been resolved.
President Mwai Kibaki's government is blaming the opposition Orange Democratic Movement party for the delay.
A government statement said Prime Minister-designate Odinga has not submitted his proposals for the Cabinet posts. It added that President Kibaki has asked Mr. Odinga to meet with him.
The two men had announced on Thursday that they had reached an agreement on the Cabinet.
At the time, Mr. Kibaki's office said the new Cabinet will be expanded from 34 to 40 ministers, who will be sworn in on April 12.
The Cabinet is part of a power-sharing agreement aimed at ending the political crisis triggered by December's disputed presidential election.
Kenyans are expressing frustration with the expanded Cabinet, calling it a wasteful financial burden.
Each minister is expected to earn a monthly salary of one million shillings, or about $15,000. In a year, ministers will make nearly as much as U.S. Cabinet secretaries, who are paid about $191,000.
Kenyan media say the new government will cost about $5.5 billion a year - an increase of more than $800 million from the current cost.
More than a thousand people were killed in riots and ethnic violence after Mr. Odinga's opposition Orange Democratic Movement accused President Kibaki of rigging the vote to be re-elected.
Some information for this report provided by AFP and Reuters.
