A suicide attack on Istanbul's main pedestrian shopping street on Saturday killed five people, including two dual nationality Israeli-Americans and one Iranian citizen, and wounded several dozen others, in the sixth suicide bombing in Turkey in the past year.

Prime Minister Ahmet Davutoglu issued a statement saying there were several foreigners among the victims.

"Turkey has always said that terrorism has no religion, no language and no race and that terrorism has to be condemned no matter who the perpetrators are," he said. "This sad event has shown once again how right our position is."