
Pakistan tightened security nationwide as tensions rose ahead of the planned protest march by Imran Khan's PTI. (AP Photo/K.M. Chaudary)

Pakistan tightened security nationwide as tensions rose ahead of the planned protest march by Imran Khan's PTI. (AP Photo/K.M. Chaudary)

PTI’s demands centred on Imran Khan's release, electoral reforms, and judicial independence. (AP Photo/Anjum Naveed)

Interior Minister Mohsin Naqvi earlier on Saturday informed PTI chairman Gohar Ali Khan that the government would not allow any sit-ins or rallies in Islamabad due to security concerns (AP Photo/K.M. Chaudary)

A security alert raised fears of potential terrorist attacks from militants recently crossing into Pakistan from Afghanistan. (AP Photo/Anjum Naveed)

Public transport, including metro bus services in Islamabad and Rawalpindi, has been halted, and all bus terminals at Faizabad, linking the twin cities, have been barricaded. (AP Photo/Anjum Naveed)

A three-day lockdown was similarly imposed in Islamabad last month during a security summit. (AP Photo/Anjum Naveed)