By Becky Anderson, Sophia Saifi, CNNLondon and Islamabad (CNN) — The sons of the imprisoned former leader of Pakistan Imran Khan say they fear for their father’s health, claiming authorities in the South Asian country are preventing them from seeing him. Sharif’s government responded with a crackdown on Khan’s party, arresting its leaders and banning it from contesting the 2024 general election. However, Kasim and Sulaiman said their cards have expired and not been renewed – a claim the ministry did not address. Amnesty International released a statement this week urging Pakistani authorities to “unconditionally restore Imran Khan and Bushra Bibi Khan’s right to see their family and lawyers.” Asked if there was a chance their father could reach a deal with the government, the sons thought it unlikely.