Mexico has cancelled fuel-import permits awarded to commodities trader Trafigura Group in a crackdown of alleged corruption among companies that compete with state-owned oil producer Petroleos Mexicanos.

Trafigura had five permits for gasoline, diesel and jet fuel revoked or not renewed on Monday, while Mexican fuel distributor Windstar also had three gasoline and diesel permits revoked, according to a government document. Windstar didn’t immediately respond to requests seeking comment. 

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