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At least eight dead in central Istanbul explosion - Turkey's Haberturk TV
The blast may have been caused by a suicide bomber, Haberturk said, without citing its sources. There was no official word on the case of the blast, which took place in Istanbul's historic Sultanahmet square, a major tourist attraction in Turkey's most populous city.
(Reporting by Humeyra Pamuk; Editing by Nick Tattersall)