Top Judge Sworn in as Pakistan's Supreme Court Chief Justice

Asif Saeed Khosa, previously a judge on the high court, began his new duties Friday, AP reported.

He replaces Mian Saqib Nisar, who during his term as the chief justice disqualified ex-premier Nawaz Sharif from holding office as part of a corruption case.

In case, Nisar last year acquitted a Christian woman, Aasia Bibi, who was on death row for eight years, in a blasphemy case.

However, Nisar became controversial because of his intervention in government affairs.

Khosa says he will work to reform the country's judicial system to ensure speedy justice to all.

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