The US United Steelworkers union has hailed a Mexican Supreme Court decision to recognise Napoleon Gomez as general secretary of the National Union of Mine, Metal and Steelworkers, or Los Mineros, following a four-year battle.
The court's second chamber ruled last week by 3-1 that Mexican Labour Secretary Javier Lozano Alarcon acted illegally in 2008 by withdrawing legal recognition from Mr Gomez.
Los Mineros appointed Mr Gomez as general secretary in May 2008, but the Ministry of Labour refused to recognise his election, alleging violations of union rules.
USW international president Leo Gerard said of the judges' decision: "This is a major victory for Los Mineros and all Mexican workers.
"The decision should sound the death knell for the Mexican government's vicious and illegal persecution of Napoleon Gomez and Los Mineros."
An outstanding arrest warrant for the miners' leader was annulled at the end of April.
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