• Protesters demanding the release of former prime minister Imran Khan have begun to arrive at the heart of Pakistan's barricaded capital, Islamabad

  • They are being tear gassed by armed forces as they make their way to D Chowk, or Democracy Square, which is close to key government buildings

  • Khan is serving a three-year jail term for corruption - a charge he denies

  • He issued a "final" call for protest to his supporters, asking them to remain in the capital until the government meets their demands

  • Authorities have locked down Islamabad, blocking highways and suspending mobile and internet services in certain areasHundred of protesters have been arrested since Sunday when the march began

  • Internet disruptions hamper coverage of protests

    Details about the whereabouts of the protesters and what's happening to them are proving hard to come by as Pakistan continues to face difficulties with internet coverage.

    The Interior Ministry says WiFi and mobile networks are being suspended in areas where there are "security concerns", but problems are being reported as far away as Karachi in the far south of the country, where there are no protests.