ROME (Reuters) - India's JSW Steel Ltd
The steel firm owned by billionaire Sajjan Jindal has signed an agreement with Italian state lender CDP, businessman Leonardo del Vecchio's holding company and steelmaker Arvedi to make the bid, the source said.
A second source said the Indian firm had confirmed its interest in joining the bid, but did not know if a formal agreement had been signed.
JSW Steel, one of India's top domestic steel producers, did not immediately respond to a request for comment.
Italy's government has been trying to find a bidder for the plant, Europe's largest by output capacity, since taking it over last year in a bid to save jobs and clean up its polluting factories.
Judges put key parts of it under special administration in 2012 following accusations it had caused serious health problems in the surrounding Puglia region in southern Italy.
The world's largest steel producer Arcelor Mittal
Neither bidder has said how much they would offer for the plant, but a source familiar with the matter told Reuters in June the CDP-led group would probably bid between 500 million and 1 billion euros ($1.06 billion).
The sale is now expected to be completed in early 2017. Officials from the Italian environment ministry had been due to deliver their verdicts on the bidders' proposals by Nov. 13.
($1 = 0.9449 euros)
(Reporting by Massimiliano Di Giorgio; Additional reporting by Promit Mukherjee in Mumbai; Writing by Isla Binnie; editing by Crispian Balmer and David Evans)