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Four arrested after deadly Istanbul blast

Turkish security forces have arrested four people in connection with the suicide bombing in Istanbul in which 10 German tourists were killed, Turkish prime minister Ahmet Davutoglu has said.

Tuesday's blast in Sultanahmet Square killed 10 German tourists and wounded 15.

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Blast hits major tourist attraction in Turkey

Credit: Google Maps

An explosion has rocked a central square in Istanbul's Sultanahmet district - a major tourist attraction in the city - according to reports.

According to the Reuters, who cite local media, there are some casualties, but the cause of the blast isn't immediately clear. Police have sealed off the area.

Witnesses reported hearing a loud blast and video footage on the CNN Turk channel showed police and ambulances at the scene.

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