http://www.bbc.co.uk/news/world-latin-america-15702285
Mr Blake, 45, was appointed interior secretary in July last year, overseeing police forces fighting drug cartels.
"Unfortunately the interior secretary, his [assistants] and the helicopter crew were found dead," government spokeswoman Alejandra Sota said.
The interior secretary is Mexico's senior cabinet position and the top official after the president, with responsibility for domestic affairs and security.
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