Imran Khan supporters march towards Islamabad despite police barriers and tear gas

Imran Khan, Pakistan's former Prime Minister, has been detained for over a year on various charges. His supporters claim that the elections in February were rigged and demand the overturning of the results. Khan remains widely popular despite his legal troubles. Khan's party, Pakistan Tehreek-e-Insaf (PTI), has organized a "long march" towards Islamabad, which has resulted in clashes and unrest in other parts of the country. Thousands of supporters have converged on the outskirts of Islamabad, with authorities imposing a strict security lockdown and erecting barricades on highways to block the demonstrators.