Police arrested Istanbul's mayor, a key opposition figure, on Wednesday, sparking protests.

Some 37 people have been arrested for "provocative" social media posts, the interior ministry says.

Christopher Potter died after being hit by a car while crossing a road in Istanbul.

Reports in the Turkish press suggest that the man was crossing the road in the early hours when he was hit by a car.

The captain collapsed during his flight from Seattle and the plane made an emergency landing in New York.

Lorenzo Prendini tells the BBC he had official permits allowing him to take the samples out of Turkey.

At least 29 people were killed in the fire, which broke out during renovation work.

President Erdogan fails to regain Turkey's big cities that he lost five years ago.