Pakistani Prime Minister Imran Khan's career was at stake on Sunday as he faced a difficult vote to oust him, potentially leading to fresh political instability in the nuclear-armed country of 220 million people.

A united opposition has tabled a no-confidence motion against Khan for a parliamentary session starting at 11.30am (0630 GMT). If they remain united, Khan is set to fall below the 172 votes needed to survive the no-confidence vote.

On the streets of the capital Islamabad, there was...