There has been an explosion in a district of Istanbul popular with tourists, reports say, with several people said to have been injured.<br />Turkey's Dogan news agency said the explosion occurred in the city's historic Sultanahmet district, close to the Blue Mosque.<br />Ambulances rushed to the scene of the blast and police have sealed off the area.There has been an explosion in a district of Istanbul popular with tourists, reports say, with several people said to have been injured.<br />Turkey's Dogan news agency said the explosion occurred in the city's historic Sultanahmet district, close to the Blue Mosque.<br />Ambulances rushed to the scene of the blast and police have sealed off the area.
