FL - Ariel, 3, & St Leo Hines, 7 mos, suffocated with bedsheet, Miramar, 8 June 2016

A Philadelphia woman admitted suffocating her 7-month-old son and 3-year-old daughter with a bedsheet during a visit to Florida, authorities said Thursday.

Sophia Hines, 40, took a bed sheet and held it over the mouth of her son, St. Leo, according to a police report. She then used the same bed sheet to cover the mouth of her daughter, Ariel.

Hines was being held without bail at the Broward County Jail. She has been charged with two counts of premeditated murder, which could potentially carry the death penalty.

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Authorities have released new details from a 911 call made last week by the cousin of a Philadelphia woman who police say admitted to suffocating her two children during a visit to Florida.

In the eight-minute call released Monday by Miramar police (...) the suspect's cousin told the operator, "Honestly, I think they are dead."

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