Breaking News-RTRS-UPDATE 4-Argentine refinery workers threaten strike over pay

BUENOS AIRES, April 29 (Reuters) - The Argentine government struggled on Thursday to broker a deal between oil companies and refinery workers to avert a pay strike that threatens to halt fuel production.
As talks resumed late on Thursday, workers prepared for a possible strike that could spark fuel shortages, disrupting the harvest of corn and a record-large soybean crop in one of the world's top grain-exporting nations.
Officials from two energy companies, who asked not to be identified, expressed confidence that an agreement was close, but union leaders said the two sides were still far apart.