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.
The suspected Istanbul suicide bomber was a foreign member of Islamic State, the Turkish Prime Minister said.
The suspected bomber is thought to have recently crossed into Turkey from Syria, Ahmet Davutoglu added.
He was not on Turkey's watch list of suspected militants.
Thousands of people are being tracked by Turkey for suspected militant links but the bomber was not one of them.
The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.