
The arrested include PTI Secretary General Arif Alvi, PTI Spokesperson Asad Umar and President PTI Karachi Ashraf Qureshi.
The security officials also used water cannons to disperse the rally near Zainab Market, injuring many.
Senior PTI leader Arif Alvi tweeted saying he had also been beaten before he was arrested:
Have been arrested after severe beatings
More than a dozen PTI workers were arrested.
Seven people were injured, including a child, who were shifted to a nearby hospital.
Party chief Imran Khan had announced launching a campaign in support of the judiciary on June 16, with all regional PTI offices organising rallies in major cities and districts.
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