South African police  have arrested dozens of people in Johannesburg on September 2 after rioters looted shops, burned tyres and blocked road junctions – the second outbreak of urban rioting in a week. (Image: Johannesburg). Cele says JHB CBD lootings is a national emergency https://t.co/wOajli3Ner pic.twitter.com/MFLdZadkmm — Eyewitness News (@ewnupdates) September 2, 2019 Police had…