The 88-year-old woman died two days after the incident and police in Minas Gerais state want to know if poor medical care and the misdiagnosis contributed to her death.
The O Globo newspaper, citing a press release from the Ipatinga mayor's office, says doctors thought Maria das Dores da Conceicao died Wednesday afternoon. She awoke inside the coffin four hours later and was rushed back to the hospital.
The mayor's statement said she died Friday. It did not give a cause, but said she suffered from hypertension.
Calls to the Ipatinga hospital, police and mayor's office were not answered late yesterday.
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