At least six people have been killed and 53 wounded in an explosion in a busy area of central Istanbul, Turkish authorities have said.
The blast happened at about 16:20 local time (13:20 GMT) on a shopping street in the Taksim Square area, the Turkish city’s governor Ali Yerlikaya said.
It is unclear what caused the explosion, which appears to have been captured on social media videos.
President Recep Tayyip Erdogan said the perpetrators would be punished.