Oceanografia has blamed “errors and misunderstandings” by Mexican officials after allegations emerged of “irregularities” in contracts with the government oil monopoly.

The offshore-vessel operator is reportedly facing a probe by the Ministry of Public Administration after internal audits by Petroleos Mexicanos (Pemex) encountered problems including MXN 3.4bn ($255m) in “irregular” contract modifications between 2010 and 2012, according to leading national daily newspaper Milenio.

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