At around 3 a.m. local time (2200 GMT Sunday) militants attacked the police station with sniper fire and then entered the building, said police officers in Pakistan's Draban region in Khyber-Pakhtunkhwa province.
Pakistan faces twin insurgencies - one in northwestern Khyber-Pakhtunkhwa by Islamist groups and one in the southwest by ethno-nationalist Baloch groups.
Allegations of her involvement in instigating the violent May 9 protests, which erupted following the arrest of PTI founder Imran Khan on corruption charges, led to her prolonged incarceration.
During the daily press briefing on Tuesday, spokesperson Matthew Miller stated, "It’s a matter for the Pakistani courts." He emphasized that Khan's sentencing was a legal issue ultimately under the jurisdiction of Pakistani courts.