After controversial arrest of Istanbul's mayor, week of unrest culminates in giant demonstration in Turkey's largest city, with some estimates putting crowd size in the millions

More than 1,100 people, including some journalists, were detained in protests against Turkish President Erdogan after the arrest of his rival, Istanbul Mayor Ekrem Imamoglu.

Hundreds of thousands of pro-democracy demonstrators have returned to the streets of Istanbul, Turkey, to show support for the city's jailed mayor. Ekrem Imamoglu, who is seen as the main rival of President Recep Tayyip Erdogan,

Turmoil unleashed by the arrest of Turkey's leading opposition figure last week has sent shockwaves through the private sector, forcing companies to rethink strategy and dig in for a period of uncertainty and potential economic instability.

Supporters of the political opposition are finding ways to fight back after the government jailed the top political rival of President Recep Tayyip Erdogan.

It followed months of escalating legal harassment of me, culminating in the abrupt revocation of my university diploma 31 years after I had graduated. Authorities seemed to believe this would disqualify me from the race because the Constitution requires the president to have a degree in higher education.