The Ministry of the Interior is confirming that three hostages have been killed, but still no word on the fate of the the other six. This brief from the MOI also lists the names and nationalities of all the hostages.

Henry, I think the timeline might be a bit too quick for the executions to be in retaliation for the arrest of 'Alwan, but we'll know more if and when AQAP releases a statement. At the moment there is a great deal of confusion, much of it compounded by the fact that Sa'dah has long been a "no-go" region for journalists, so everyone is relying on cell calls with folks on the ground.