A 57-year-old man arrested on suspicion of murder after a woman was found dead at a house in south Lancashire has been released without charge.
The body of Sue Workman, 55, was discovered in Plantation Road in Turton, near Bolton, on Thursday.
The arrested man was released from custody on Saturday night.
"This is a particularly complex case and there is a huge amount of work to be undertaken," Det Ch Insp Mark Gray, of Lancashire Police, said.
"I have a full team of detectives working on the investigation to ensure that we fully establish all the facts surrounding this tragic case."