Solo Nqweni is the third cricketer known to have contracted the disease after Pakistan's Zafar Sarfraz and Scotland's Majid Haq.
Zafar was the brother of Pakistan international player Akhtar Sarfraz.
The activists of PFI had allegedly mobilised rioters and were in contact with Hayat Zafar Hashmi, the key conspirator of the violence, the police said.
Rashid Latif confirmed the news and asked everyone to pray for Riaz Sheikh's departed soul.
Fast bowler Mohammad Amir was named in the Pakistan squads on Friday for the limited over New Zealand tour, marking a return to the national team after serving a five-year ban for spot-fixing.