Dec 1 (Reuters) - Rio Tinto (LON:RIO) Ltd RIO.AX :
* Response to press speculation
* confirms it is cooperating with inquiries from relevant authorities relating to impairment included in company's 2012 accounts in respect of rio tinto coal mozambique
* "as sec investigation, which started in april 2013, remains ongoing it would be inappropriate to comment further at this time" Source text for Eikon: ID:nASX6HgPQN Further company coverage: RIO.AX