The Workplace Ombudsman is investigating mining giant for a possible breach of the Workplace Relations Act over the sacking of the staff at a meeting on January 21, The West Australian reported.
The Ombudsman's WA director Leigh Quealy said initial results of a survey provided to around 700 of the former employees suggested the workers were not given the correct notice.
Mr Quealy said the workers reported they were called in for a "safety meeting" before being told the mine was to close.
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