Why are thousands of people protesting in Turkey?

Tens of thousands of people across Turkey have been protesting the arrest of Istanbul mayor Ekrem Imamoglu – the main political rival of President Recep Tayyip Erdogan.
Protesters have been fired upon with tear gas and rubber bullets in what has become the worst unrest in the country for more than a decade.
Demonstrations began in Istanbul on 19 March, sparked by the arrest of leading opposition politician Ekrem Imamoglu earlier the same day.
It came days before Imamoglu was due to be elected as presidential candidate for the secular Republican People’s Party (CHP). He was confirmed as the party’s candidate for the 2028 election from his prison cell on Sunday, following a symbolic vote.
Prosecutors accuse Imamoglu of corruption, which he denies. More than 100 people have also been detained as part of the investigation.

Courtesy: BBC