Detectives hunting murder suspect Michael Cope have arrested a man on suspicion of assisting an offender.
The 25-year-old was arrested on Monday night, and is still in police custody.
Police wanted to speak to Cope, 28, in connection with the murder of mother-of-two Linzi Ashton, who was found at her home in Salford on Saturday evening.
A Home Office post mortem concluded Linzi died as a result of pressure to the neck and multiple injuries.
Cope had previously been in a relationship with Linzi Ashton.
Greater Manchester Police and Crimestoppers, the independent charity, have also announced a £5,000 reward for anyone who has information leading to the arrest and conviction of Michael Cope.
Chief Superintendent Kevin Mulligan said: "We are continuing to do all we can to trace Michael Cope and urge him once again to hand himself into the police.
"We also reiterate our appeal to those who may have information on Cope's whereabouts to speak to us in confidence.
"We are also working with our partner agencies to look at evicting anyone who is using their property to offer this man safety."
Anyone with any information is asked to call police on 0161 856 5092 or call the independent charity Crimestoppers anonymously on 0800 555 111.