"The technical investigative committee has not found anything indicating any illegal intervention or terrorist action," Xinhua cited the civil aviation ministry as saying.
A Russian passenger airliner crashed in Egypt's Sinai peninsula on October 31 killing all 224 people on board.
The US and other Western officials have maintained that a bomb blew the Russian plane apart about 25 minutes after it took off from the Egyptian resort town of Sharm el-Sheikh.
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