Dr Mumba has expressed shock that the situation in the ruling party has been allowed to escalate to such violent levels leading to the loss of life.
The MMD president who spoke through his Director of Communication Muhabi Lungu has told QFM News that President Sata as leader of the ruling party should take responsibility over the happenings in the party.
He says President Sata should prevail over the PF cadres and stop the squabbles and violence from escalating further in the PF.
Dr Mumba says the nation was made to understand that the wrangles in the PF had come to an end, only to witness the violent clashes between rival camps in the PF.
He expressed regret over the killing of the PF cadre yesterday and expressed condolences to the bereaved family.
And UPND leader Hakainde Hichilema described as a national crisis of unprecedented proportions when citizens find it possible to arm themselves in the name of politics with no fear of consequences.
Mr Hichilema has called on President Michael Sata through the Minister of Home Affairs and Zambia Police to immediately disband the heavily armed PF militias whose existence has so far been denied.
He says the police must act to protect citizens without any undue political influence from lawlessness, as that is their mandate.
He states that it is his heartfelt prayer that President Michael Sata and his Cabinet will for once respond to these unprecedented brutal events in the country in protection of the country’s long cherished peace and stability.
Mr Hichilema has also called upon the Zambia police to urgently investigate and bring to book the perpetrators of these political crimes and those that sponsor them.
He adds that it is long past time for President Sata to reign on the cadres and leaders in whose name the anarchy is taking place.
The UPND leader has also appealed to the Church and other Civil Society Organisations, to call for genuine intra and interparty political dialogue and address this emerging national tragedy and other issues.
And Vice president Guy Scott told the Parliament today that a docket has been opened for murder and an investigation launched.