Residents of Islamabad are tiring of regular demonstrations demanding the release of the former prime minister Imran Khan, with the marches leading to clashes with security forces.

Pakistani authorities arrested nearly 1,000 supporters of jailed former prime minister Imran Khan who stormed the capital this week to demand his release, the city's police chief said on Wednesday.

Thousands of security forces poured into central Islamabad in an attempt to quell protests in support of Khan that have gripped the capital.