Two more people have been arrested in connection with the murders of great-grandparents who died in an arson attack at their home in St Helens.
Eric Greener, 77, and Sheila Jackson, 83, died after the blaze in the early hours of 15 July.
On Thursday, Merseyside Police said that a 33-year-old man from Aigburth was arrested on suspicion of conspiracy to murder and possession of cannabis.
He has been taken to a police station for questioning.
A 36-year-old woman from Everton was arrested on suspicion of conspiracy to murder and conspiracy to commit arson. She has been conditionally bailed.
Lee Owens, 46, of no fixed address, has been charged with two counts of murder and arson with intent to endanger life. He has been remanded in custody and will appear at Liverpool Crown Court on 28 November.
Detective Chief Inspector Steve McGrath said: “Progress is being made but I would also like to take this opportunity to ask for anyone who holds information to come forward if you haven’t yet done so.
“Please do not assume that we already know something which could be a vital piece of the jigsaw. Let us make the assessment and take the appropriate action.”
Keep up with all the latest news from the UK and around the world by following Sky News
A 31-year-old man from St Helens who was arrested on suspicion of murder remains on conditional bail.
A 48-year-old woman of no fixed abode; a 53-year-old woman from Anfield and a 45-year-old man from Liverpool, who were all arrested on suspicion of conspiracy to murder and conspiracy to commit arson, have been conditionally bailed.
