ISIS chief Abu Bakr al-Baghdadi and three of his top aides were seriously ill after being poisoned during a lunchtime feast and have been shifted to an unknown location under strict measures.<br/><br/>Accoeding to several Arabic-language and Iranian news sites meals prepared for Baghdadi and three other ISIS leaders were allegedly poisoned in Nineveh's Be'aaj district in Iraq.Citing a source, Iraqi news agency WAA said the four are suffering from "severe poisoning" and have been transferred to an unknown location under strict measures.<br/><br/>After the incident, ISIS militants were conducting several arrests in order to determine who was behind it.<br/><br/>Baghdadi, who has reportedly been wounded multiple times, carries a USD 10 million bounty on his head.<br/>News of Baghdadi's poisoning came as Iraqi media claimed some top ISIS commanders were among 16 militants killed when one of the leaders' explosive belt exploded during a meeting.