The two sisters, three and two years old, crawled into the washing machine while playing at home in Qiaoshe township of Xinjian county, and died there around noon Saturday, Xinhua reported citing police sources.
The girls' mother was cooking and the father was listening to music when the tragedy took place. Their one-year-old son was also at home.
Police found the girls died of suffocation and have ruled out foulplay.
Further investigation is under way.
The washing machine manufacturer, Haier, issued a statement, saying that company experts had arrived at the scene to assist the investigation.
--IANS (Posted on 24-09-2013)