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DUBAI (Reuters) - JPMorgan JPM.N and Morgan Stanley MS.N have been picked to advise on Saudi Aramco's potential acquisition of a stake in petrochemical maker SABIC 2010.SE, four sources familiar with the matter said.

Late last week, Aramco IPO-ARMO.SE confirmed a Reuters report that it was working on a possible purchase of a "strategic stake" in Saudi Basic Industries Corp (SABIC) from the Public Investment Fund, the country's main sovereign wealth fund.

Aramco and Morgan Stanley did not immediately respond to a Reuters request for comment. JPMorgan declined to comment.