The Mexican Interior Minister Miguel Angel Osorio Chong says 14 people were killed in an explosion at Mexican oil giant Pemex's Mexico City headquarters and 80 were injured, reports Reuters.
The death toll could still rise, he told local television.
More top news
The 69-year-old republic veteran told the annual Sinn Fein Ard Fheis it would be his last as leader.
A body has been found in the search for missing teenager Gaia Pope.
Money raised for a Down Syndrome charity by the mother of a little girl with the condition has been stolen in a suspected burglary.