An explosion has rocked the main shopping district in central Istanbul, killing at least four people and injuring a number of others.
A suicide bomber detonated an explosive in Istikal Street, a pedestrianised boulevard lined with international stores and shopping centres.
A suicide bomber who killed four people and injured 36 others in an attack in Istanbul may have been from the so-called Islamic State militant group, Turkish officials have said.
Officials earlier said they believed the banned Kurdish Workers Party (PKK) was behind the attack, but now say new evidence suggests it have been the work of either the PKK or Islamic State.
No group has yet claimed responsibility for the attack.
Armed police have put central Istanbul on lockdown after the explosion in Istiklal Street, a pedestrian boulevard lined with international shops, cafés, theatres and foreign consulates.
Four bystanders, plus the bomber, were killed in the blast while 36 others were hurt. Turkey's health minister Mehmet Müezzinoğlu has said seven people are in a "serious" condition.
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.