A Sacramento mother was arrested Tuesday for allegedly killing her 6-week-old baby by putting her in a microwave oven, police said.

The infant, Mirabelle Thao-Lo, was found dead March 17 after officers responded to the home, the Sacramento Police Department said.

A three-month investigation uncovered evidence that the child died from "extensive thermal injuries," the department said in a statement.

"Based on that research and the autopsy results," the statement said, "detectives believe the injuries occurred as a result of the child being burned in a microwave oven."

On Tuesday morning, officers arrested the mother, Ka Yang, 29, at the home in the 800 block of Rood Avenue. Yang was booked into the Sacramento County Main Jail and charged with homicide, police said.

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-- Robert J. Lopez

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Photo: Ka Yang. Credit :Sacramento Police Department