july 2013 giving a sermon. he may have been killed in a russian air strike last month. cnn correspondent diana magnay live in moscow with the breaking details. what are russian media saying about this may 28th air strike, and what kind of evidence are they giving to support the notion that they have killed this guy? >> reporter: christine, at the moment, it is russian state media who say that the defense ministry is investigating information that al baghdadi was killed in a may 28th russian air strike in the southern suburbs of raqqah. the information they're getting is that he was attending a meeting at a command post there with various other isis personnel, trying to work out how to get isis fighters out of the city of raqqah, which, of course, is being squeezed, both by russian and syrian forces and by the coalition, and that he may have been killed alongside others in a russian air strike