Johannesburg - The Police and Prisons Civil Rights Union (Popcru) is upset by the fact that so many police officers were being killed while doing their job.Meanwhile, police confirmed that a suspect had been arrested in Themba following the killing of a constable who was attending a business robbery scene. He was arrested following information from the members of the community. Police are still looking for a murder weapon. "It has come to our attention that these criminals will stop at nothing in undertaking their malevolent deeds," spokesperson Richard Mamabolo said in a statement."They have [taken] it upon themselves to butcher the very people who are protecting our communities, and therefore attempting to render our communities as criminal blisses [sic]."The union called on police management to ensure that all officers were properly armed and well-resourced to defend themselves and innocent citizens."We shall not sit back and watch our country being hijacked by these criminal elements, who continue to turn our children into orphans."A total of three police officers have been killed in Johannesburg and Cape Town over the past two days.Vosloorus shoot-outOn Wednesday, a 36-year-old police officer at Vosloorus Crossing was killed during a shoot-out with robbers. On the same day, in the Western Cape, a member of the Hawks was stabbed to death after he stopped on the N2 to inspect damage to his car.On Thursday morning, officers were attending to a business robbery in Sekampane section when a shoot-out ensued between them and the suspects, Gauteng police spokesperson Lieutenant Colonel Lungelo Dlamini said.A 35-year-old officer was shot and wounded and rushed to hospital, but he died on arrival.The Congress of the People on Thursday also condemned the killing of police officers."Any murder of a police officer is as abhorrent to us as any murder of a civilian by the police," spokesperson Dennis Bloem said in a statement."The police must have the back of communities in the same way that communities should have the back of the police. Our security and that of the police must remain fully inter-dependent."Cope called on President Jacob Zuma to lead the "chorus of condemnation"."He should set the tone to influence public response and get maximum community support to identify suspects to the police."Authorities are not doing enough to orchestrate community repulsion for murder of police as well as murder of civilians by police," Bloem said.