LUSAKA (Reuters) - Zambian workers have downed tools at a mine and copper processing plant belonging to Konkola Copper Mines (KCM), a unit of Vedanta Resources, in a dispute over the pace of wage talks, a union official said on Wednesday.

“The day shift workers have not entered the plant, they are protesting the slow pace of salary negotiations,” National Union of Mine and Allied Workers (NUMAW) trustee Jonathan Musukwa told Reuters.