Pakistan has tightened security around Islamabad and Rawalpindi ahead of a planned Pakistan Tehreek-e-Insaf (PTI) protest march, with authorities blocking major routes and deploying additional security personnel amid concerns about possible clashes.The PTI had initially planned to begin its long march from Peshawar to Islamabad on September 27, demanding the release of jailed former Prime Minister Imran Khan. However, the party later postponed the march to October 4. PTI spokesperson Zulfi Bukhari has also said the party could potentially begin the march earlier.Key HighlightsPakistan has tightened security around Islamabad ahead of the PTI march.Major highways and entry routes have been blocked with shipping containers.Thousands of additional police and paramilitary personnel have been deployed.Hospitals in Islamabad have reportedly been asked to prepare for possible mass-casualty situations.PTI initially planned the march for September 27 but postponed it to October 4.The party is demanding the release of Imran Khan and restoration of constitutional and political rights.Several PTI activists and members of Khan’s family have been detained in recent days.Why Has Pakistan Imposed Lockdown Measures?Authorities have restricted access to Islamabad as the government prepares for the planned PTI demonstration.According to Reuters, major highways connecting Islamabad with Khyber Pakhtunkhwa have been closed, while shipping containers have been placed at several points to restrict movement towards the capital. Nearly 35,000 additional police and paramilitary personnel were reportedly stationed in and around Islamabad.The measures are intended to control the movement of protesters and prevent large gatherings in sensitive areas of the capital.Rawalpindi has also become a major focus because the city houses Pakistan's military headquarters. Security restrictions have affected transport and access to areas around Islamabad and Rawalpindi.Hospitals Prepare for Possible CasualtiesConcerns over possible clashes have also affected the health system.Reports from Pakistani and international media said hospitals in Islamabad were instructed to prepare additional beds and ensure surgical facilities were ready to respond to a possible mass-casualty situation.Moneycontrol, citing a report by Drop Site News, reported that federal health authorities asked hospitals to prepare for a potential emergency ahead of the PTI march. The preparations reportedly included additional beds and readiness in surgical departments.These preparations do not establish that casualties will occur, but they show the level of concern among authorities about the possibility of violence if large crowds confront security forces.PTI March Postponed to October 4The PTI initially planned its long march for September 27. On September 25, however, Khyber Pakhtunkhwa Chief Minister Sohail Afridi announced that the party had postponed the march until October 4.Reuters reported that the decision was confirmed by Afridi, while PTI spokesperson Zulfi Bukhari said the party could still decide to begin the march earlier.Pakistan's Dawn reported that the PTI cited administrative and logistical issues surrounding the postponement, while party-linked accounts and other reports have offered different explanations for the decision.The postponement gives authorities additional time to maintain restrictions around Islamabad, although the security situation remains closely watched.(READ MORE : Pakistan Indus Water Treaty Row: Focus Shifts to Domestic Water Problems)What Is the PTI Demanding?The protest is centred on the demand for the release of Imran Khan, who has been in prison since 2023.The PTI has also called for the restoration of constitutional and political rights and raised concerns about Khan's treatment in detention. The party has maintained that it intends to continue its political campaign despite government restrictions.The government, meanwhile, has warned against holding a march that could result in violence and has said security measures are necessary to maintain public order. Reuters reported that Interior Minister Mohsin Naqvi had warned that authorities would respond if the march became violent.PTI Leaders and Activists DetainedSecurity measures have also included arrests and detentions of PTI-linked individuals.Reuters reported that three of Imran Khan's sisters and hundreds of PTI activists had been detained in recent days, with authorities citing public-order concerns. Earlier, Aleema Khan, one of Khan's sisters, was arrested in Lahore and sent to jail for 30 days, according to a notification issued by the city's district administration.The PTI has criticised these measures and continued to insist that its political mobilisation should proceed.What Happens Next?The immediate focus is on whether the PTI will proceed with its revised October 4 schedule and whether restrictions around Islamabad and Rawalpindi will remain in place.The previous major PTI protest in 2024 ended in deadly clashes between protesters and security forces, adding to concerns surrounding the current mobilisation. Reuters has reported that authorities are taking extensive precautions because of that recent history.For now, Pakistan remains under heightened security preparations, while the government and PTI remain at odds over the protest, Imran Khan's detention and broader political issues.The reported hospital preparations and large-scale security deployment reflect concerns about potential unrest, but the actual scale of any confrontation will depend on whether the march proceeds and how protesters and security forces respond to each other.