Party representative Edwin Lifwekelo said the PF cadres created violence in Kabwata during the rally resulting in many supporters that were injured.
Lifwekelo has since urged the police to bring to book the PF thugs that were armed with chains, stones and other objects to inflict injury on innocent Zambians.
PF cadres on Sunday assaulted UPND cadres while police helplessly watched without intervening and claimed to have been overpowered.
The PF cadres had formed a barricade at a road that led to Kabwata Basic School football pitch while armed police officers stood in the middle with UPND cadres on the other side.
However, police failed to restrain the charging cadres as they surged to clash in their presence.
The PF cadres, who were armed with stones and chains, hit several UPND cadres who bled profusely and were rushed to the hospital. In the ensuing confusion, PF cadres descended on their colleague whom they brutally beat and was pronounced dead at UTH.