article_snippet.sent: No reason was given for the decision by ISIS .
article_snippet.sent: No reason was given for the release of the prisoners, which took place in Himera just southwest of Kirkuk, 180 miles north of Baghdad.
article_snippet.sent: It was not clear why the radical jihadists had decided to .
article_snippet.sent: the radical jihadists previously freed 200 more the radical jihadists was holding under . similarly mysterious circumstances.
highlights_snippet.sent: No explanation has been given as to why the 216 Yazidis were released .