Manchester shootings: Armed police raided address in same estate weeks before fatal attack ARMED police staged a raid at a housing estate weeks before two officers were targeted at an address there in a fatal gun and grenade attack, sources have confirmed. Pc Nicola Hughes and Pc Fiona Bone were killed on Tuesday when responding to a burglary report Armed police raided a different house on Hattersley estate on August 16 A search took place on the morning of August 16 at a house on the Hattersley estate in Greater Manchester as part of the investigation to trace wanted murder suspect Dale Cregan. Pc Nicola Hughes, 23, and Pc Fiona Bone, 32, were killed at a different address on the estate on Tuesday when they responded to a report of a burglary in the area. Last night Cregan was charged with the murders of Pcs Hughes and Bone, two more counts of murder and four of attempted murder. He will appear in custody at Manchester City Magistrates" Court this morning. It is understood that no arrest was made in relation to the August 16 search. No-one from Greater Manchester Police was available for comment last night. Following the deaths of Pc Hughes and Pc Bone, the Chief Constable of Greater Manchester Police, Sir Peter Fahy, said the house in Abbey Gardens where the officers were called to was not known to them. It has not featured in this particularly huge inquiry we have undertaken. So it would be routine to have unarmed officers sent to the scene," he said. The investigation into the murders of father and son David and Mark Short involved officers on armed patrol 24 hours a day, seven days a week, in the Clayton and Droylsden areas, he added. But he explained that "clearly we cannot send armed officers to the hundreds of incidents we get not only in these areas but also in other areas." He said: "These were two officers going about their normal duties. Like all officers, they went to a variety of incidents not knowing what it was that they would face. Cregan, 29, will appear court charged with the four murders - of Pcs Hughes and Bone, and Mark and David Short. A 28-year-old man who was arrested on Wednesday in Hattersley on suspicion of conspiracy to commit murder was earlier named by sources as Stephen Garvey. The BBC said he was being questioned about the phone call reporting a burglary which lured Pcs Hughes and Bone to their deaths. Sir Peter made a further appeal to the public at last night's press conference in which the charges were announced, describing the investigation as "complex." Nazir Afzal, Chief Crown Prosecutor for CPS North West, said: "Cregan has also been charged with the attempted murders of Michael Belcher, Ryan Pridding and John Short on 25 May and Sharon Hark on 10 August. The CPS and Greater Manchester Police are absolutely determined to deliver justice for those who have been killed and for their families, and we will continue working closely during the ongoing investigations into these deaths. Mark Short died from a gunshot wound to the neck after a gunman opened fire in the Cotton Tree Inn in Droylsden, Tameside, at around at 11.50pm on May 25. Cregan has also been charged with the attempted murders of Mr Belcher, Mr Pridding and Mr Short, who were in the pub at the time. The body of the victim's father, David Short, 46, was found at a house in Folkestone Road East in Clayton, Manchester, at 10.30am on August 10, after police were called there following reports of gunshots. A hand grenade was also used in that attack. Less than 10 minutes later, there was another grenade explosion outside a house in Luke Road in Droylsden. No-one was injured in that incident. Cregan has been charged with the attempted murder of Ms Hark in relation to the incidents that day.