Six people were killed and 53 injured when a bomb attack rocked Istanbul. 

An explosion in central Istanbul has killed six people, president says. 

A bombing rocked the popular Istiklal Street in Istanbul, injuring a number of people. 

An explosion on the Istiklal Street in Istanbul killed six and injured 53. 

Reports of an explosion in a popular street in Istanbul. 

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Turkish President Recep Tayyip Erdogan says the 'treacherous attack' on a busy Istanbul thoroughfare 'smells like terrorism'.