Mokhtar Belmokhtar claimed responsibility for the seizure of dozens of foreign hostages at the In Amenas gas plant in Algeria in January in which more than 60 people were killed.
The Chadian claims of his death comes days after Chad's President Idriss Deby said soldiers in Mali had killed another leading al Qaeda commander in the Sahara, Adelhamid Abou Zeid.
French officials said they could not confirm the killing of either Abou Zeid or Belmokhtar.
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The brother of Victoria Wood has launched an appeal to raise funds for a statue in the late comedian's honour.
Health professionals say that 16 people have been struck by the same strain as E.coli after eating blue cheese.
Tom Webb, 22, died after receiving a single stab wound to the chest on January 19 this year.