The last contact Algerian authorities had with a missing Air Algerie aircraft carrying 116 people from Burkina Faso to Algiers was at 01:55 GMT (2:55am BST) when it was flying over Gao, Mali, an Algerian official says.
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The boy was found unconscious and in cardiac arrest and was rushed to hospital where he died.
The victim, who was wearing her uniform at the time, was found knocking on doors nearly four hours after she was abducted.
There will be gales across Scotland and northern England this morning, but these will gradually ease through the afternoon.