Islamabad, Sept. 21 -- Rights lawyer Michael Polak on Monday submitted an "urgent complaint" to the United Nations Working Group on Arbitrary Detention and other UN Special Procedures over the detention of former Pakistan Prime Minister Imran Khan's sister Aleema Khan, alleging that she was unlawfully detained over her political advocacy and support for her brother, who has been incarcerated in Pakistan since August 2023.

In a post on X, Polak, a barrister specialising in public international law, international crime, human rights, strategic litigation and serious criminal offences, said he had filed the complaint "upon instructions from friends and family".

"Upon instructions from friends and family, I have submitted an urgent complain...