A football match between two of Istanbul’s top teams has been postponed for security reasons, Turkish authorities have announced.
The game was called off at short notice, a day after a suicide bomber killed four people in the city.
The Istanbul governor’s office said the decision had been taken “after the evaluation of credible intelligence”.
The bombing in Istanbul’s main shopping street was blamed by the authorities on so-called Islamic State (IS).
Fans had already begun to arrive for the Fenerbahce-Galatasaray match at Galatasaray’s Turk Telecom Arena when the announcement was made.
There were boos as supporters were left with no choice but to leave the ground.
The postponement came even though the authorities have repeatedly urged the 15 million inhabitants of Turkey’s largest city to carry on with their normal daily lives after the blast.
Interior Minister Efken Ala meanwhile named the bomb suspect as Mehmet Ozturk, born in 1992 in Gaziantep.
He told reporters that five people had been questioned so far.
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Mr Ala also announced a review of security measures in seven Turkish provinces following several attacks since July.
Three Israelis – two with Israeli-US nationality – and an Iranian were killed by the bomb attack. Another 36 were injured.