Manchester police killings: Detectives given more time
Detectives are continuing to question a man in connection with the deaths of two police officers in Greater Manchester.
PCs Fiona Bone, 32, and Nicola Hughes, 23, suffered fatal injuries in a gun and grenade attack in Mottram, Tameside, on Tuesday morning.
Home Secretary Theresa May said their deaths had "devastated" the force.
Police have now been given more time to interview 29-year-old Dale Cregan on suspicion of their murders.
Mrs May condemned the "savage acts of pure brutality" that led to the killing of the unarmed officers.
Mr Cregan had been the subject of a huge manhunt following two murders earlier this year of a father and son in separate attacks in the area.
A 28-year-old man is also being held on conspiracy to commit murder.
A police spokesman also said a man had been arrested in connection with an offensive Facebook page set up following the deaths of the officers.
Meanwhile, an online book of condolence set up in tribute to the officers had received 33,500 signatures and that more than 21,000 messages of support had been posted on the force's Facebook page.
Mrs May cut short her holiday to travel back to the UK to visit Greater Manchester Police's headquarters.
The minister was given a two-hour briefing by senior officers conducting the investigation and met Sir Peter Fahy, the force's chief constable.
Speaking on Wednesday evening, Mrs May said: "(The attacks) have left grieving families, they have devastated Greater Manchester police force.
"These were brave and talented officers who were going about their everyday duty, doing what police officers do day in and day out, protecting the public and fighting crime.
"They were incredibly brave and their deaths remind us what police officers can face every day."
PC Bone and PC Hughes had been sent to investigate what appeared to be a routine burglary report in Abbey Gardens, Mottram, on Tuesday, when they were attacked.
Eyewitnesses said a hail of bullets was fired and then a grenade was used during the attack.
Post-mortem examinations revealed both officers died as a result of gunshot wounds. A gun believed to have been used during the attack has been recovered.
Shadow home secretary Yvette Cooper visited the scene of the killings on Thursday morning with local MP Jonathan Reynolds to lay flowers.
She said that the "whole country" wants "justice to be done" following the deaths and the local community were "still shocked and frightened about what has happened".
The second man was detained in the Hattersley area on Wednesday on suspicion of conspiracy to murder.
Mr Cregan was arrested when he walked into Hyde police station a short time after the shooting.
Sir Peter warned at a press conference on Wednesday of a long-standing feud between gangs in the area.
He said the force had issued threat-to-life warnings - so called "Osman warnings" notices given to people under threat of being murdered or seriously injured - to "a large number of individuals".
The BBC announced it had postponed the transmission of the final episode of its drama Good Cop following the killings.
A BBC spokesman said that episode, which was due to be broadcast at 21:00 BST, featured scenes of a violent attack on a female police officer and so would be shown at a later date to avoid causing "any further distress to the friends, families and colleagues" of PCs Bone and Hughes.