by Asif Chaudhry | Wajih Ahmad Sheikh in Dawn, Sept 29th, 2023• Police submit challans in cases against PTI leaders, workers over May 9 violence• SHC issues notice to information ministry over broadcast ban on ex-PM LAHORE: Joint investigation teams constituted to investigate the violence following PTI chief Imran Khan’s arrest in connection with a graft case in May have declared more than 900 activists, including the former prime minister and other party bigwigs, prime…