Several more people were swept away by the rushing water, which turned streets into muddy rivers in areas hit by last month’s 7.8-magnitude quake, officials said.
India, which holds the bloc’s presidency this year, has sought to highlight the economic impact of the conflict as well as issues such as climate change and poorer countries’ debt.
Justice Tariq Saleem Sheikh reprimanded PTI for not planning its public gathering ahead of time and said that if they wanted to hold a jalsa, then the preparations should have begun 15 days prior.
The prime minister told the interviewer that friendly countries like China were supporting Pakistan despite the fact that Imran Khan had hurt their brotherly ties.
Khan was ousted from office by a no confidence vote last year, and has been snarled in a series of legal cases as he campaigns for early elections and his return to office.
Police hit Khan supporters in baton charges and lobbed tear gas canisters, some of which landed on the lawns of Khan's house, according to video images released by his party.