George Mpombo has urged President Michael Sata to reassert his authority in the Patriotic Front and the nation.
Mr Mpombo notes that the current situation where cadres have reached an extent of killing each other is a source of concern to every Zambian and the international community.
Speaking to Q-News in an interview, Mr. Mpombo says it is sad that President Sata has failed to bring sanity in the ruling party.
He says the silence by President Sata on the happenings in the party shows that he has lost complete control of the affairs of the party.
Mr. Mpombo states that it is imperative that the Head of State breaks his silence on the happenings in the PF.