A key trade union at Coal India Ltd NSE -1.43 %. has warned workers may strike over delays in finalizing salary increases, a move that would risk complicating efforts to meet soaring fuel demand.
Talks held July 1 failed to reach any agreement over a pay deal, said Sudhir Ghurde, who represented Akhil Bharatiya Khadan Mazdoor Sangh, one of the leading unions, at the meeting.