Tens of thousands of people marched in Berlin on Saturday in a show of support for protesters in Iran where unrest ignited by Mahsa Amini's death in police custody entered a sixth week despite a deadly state crackdown, Paralel.Az reports citing Reuters.

The protests have posed one of the boldest challenges to Iran's clerical leadership since the 1979 revolution, even if they do not appear close to toppling a government that has deployed its powerful security apparatus to quell the unrest.

Amini, a 22-year-old Iranian Kurd, died in the custody of morality police after being detained for "improper attire". Protests erupted at her funeral on Sept. 17 in the Kurdish town of Saqez before spreading across Iran. Rights groups say more than 200 people have been killed in the crackdown.

In Berlin, police estimated 80,000 people joined the march, with protesters waving Iranian flags and holding banners saying "Women, Life, Freedom". Organisers said Iranians had travelled from the United States, Canada and all over the European Union.

Anti-government activists said the Berlin march was the largest ever demonstration against the Islamic Republic by Iranians abroad.

Videos posted on social media - which Reuters could not independently verify - showed protests continuing in Iran at several cities including Tehran, northeastern Mashhad, northwestern Mahabad and a number of universities across the country.