Police officers fire rubber bullets as they disperse African immigrants who are carrying machetes in Johannesburg, April 17, 2015. South African police fired rubber bullets and a stun grenade on Friday to disperse a gang of African immigrants who had armed themselves with machetes in a run-down district of east Johannesburg, a Reuters photographer said. South Africa has been hit by a wave of violence against African and other immigrants in the last two weeks. The foreigners have complained about a lack of protection and some have started to arm themselves. REUTERS/Siphiwe Sibeko