Kenya's Justice Minister Martha Karua has resigned from the coalition government, saying that her reform agenda was being undermined.
She said judges were being appointed without her knowledge and her position as minister had become untenable.
Mrs Karua was a key ally of President Mwai Kibaki and was his negotiator for the power-sharing deal to end the bloodshed after disputed polls in 2007.
Correspondents say it is the latest sign of tensions in the coalition.
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