Two new suspects have been arrested on suspicion of murder after Sian Roberts was found stabbed to death in Higher Broughton, Salford.
Two men aged 34 and 52 are now in police custody for questioning.
Ms Roberts’ body was discovered by police at a rented house on St Helier’s Drive at 6pm on Sunday evening.
A Home Office post mortem revealed that the 36-year-old hairdresser had been knifed repeatedly in the chest.
Detectives believe a row could have sparked the horrific attack but stressed they were still investigating a motive and needed the public’s help to identify where Sian had been in the days leading up to her death.
A 36-year-old man arrested at the scene of the crime on Sunday has been bailed until Thursday 28 January 2016.
Greater Manchester Police were given more time to question the man yesterday but have now released him pending further enquiries.
Friends and wellwishers laid flowers at the scene of the attack and paid tribute to Ms Roberts on social media.
One wrote: “RIP Sian Roberts completely shocked and really really deeply sadden a woman that I’ve known since nursery condolences go out to the rest of your family at this difficult time.”
Another posted: “There is no words to describe the heartbreak of your family and friends Sian you had a very big heart and I’m glad to have known you and your lovely soul.”
Houses on the small residential cul-de-sac were cordoned off while Crime Scene Investigators hunted for clues and potentially the murder weapon.
Police launched a murder investigation at the same house on St Helier’s Drive in July 2014 after the death of 49-year-old Jaqueline Jordan.
Neighbours also spoke of their shock at the attack.
Detective Chief Inspector Terry Crompton said: “We are making significant steps to find out what happened to Sian Roberts and our investigation has so far lead to three arrests.
“We are still keen to speak to anyone who came into contact with Sian in the lead up to her death.
“Our specialist support officers are doing all they can to help Sian’s family through this difficult time.”
Anyone with information should phone police on 0161 856 4711 or the independent charity Crimestoppers, anonymously, on 0800 555 111.