At least 50 per cent of a day's production of about 1.7 million tonne of coal in the country was hit today as majority of about 4 lakh coal workers across the country joined the strike called by various trade unions.<br/><br/>Coal workers joined the nationwide strike on the call of major trade unions like INTUC, AITUC and CITU to pitch for their agenda that includes opposition to any further stakes sale in Coal India.<br/><br/>Coal India Director Personnel, R Mohan Das told PTI,about 50 per cent of the production has been hit as in most of the mines only 50 per cent workers.<br/><br/>However, INTUC backed Indian National Mineworkers' Federation Secretary General S Q Zama claimed that 90 per cent of the day's production has been hit in Coal India mines with work severely hit at its arms-Western Coalfields Ltd in Maharashtra, Central Coalfields Ltd and Bharat Coking Coal Ltd in Jharkhand.<br/><br/>Coal India, which accounts for about 80 per cent of the domestic production records an output of about 1.6 to 1.7 million tonnes of coal daily.