Former Pakistan Prime Minister Imran Khan's sister Uzma Khan on Wednesday filed a fresh contempt of court petition in the Supreme Court, alleging non-enforcement of previous judicial directives issued by the country's apex court.

An similar request by Uzma had been turned down by the SC last week; the court is set to hear cases concerning Imran's health on Sept 16.

Plea says relevant officials have also "failed to arrange phone calls" between Imran and his sons.