A Palestinian group calling itself the Al Tawhid Al Jihad brigade has issued a claim that it has killed BBC Gaza correspondent Alan Johnston.The BBC says it is aware of the reports and is deeply concerned, but stresses there is no independent verification.
In a statement faxed to news agencies, the group contrasts the attention given to Alan Johnston's captivity with that given to Palestinians held in prison.
Mr Johnston was abducted as he returned home from his Gaza office on 12 March.
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