Former Commerce, Trade and Industry Minister Bob Sichinga has re-joined the UPND after ditching the ruling PF.
Mr Sichinga announced the development during a news briefing addressed by UPND leader Hakainde Hichilema at Chainama Hotel in Lusaka.
Mr Sichinga said he has left the PF because of alleged intolerance and increased violence in the country perpetrated by the PF cadres.
He charged that President Edgar Lungu lacks a vision to steer the country forward.
Mr Sichinga who also served as Agriculture Minister also stated that he has left the PF because he is not comfortable with the current party management in the PF.
He also appealed to President Lungu to tame the violence since he is the Commander in Chief of the Armed Forces.
Mr Sichinga said President Lungu has a duty to protect the peace and security of the nation.
Mr Sichinga is a founder member of the UPND.