COPS have launched an urgent murder probe after an elderly couple were killed in a “sickening arson attack”.

Peter Eric Greener, 77, and his partner Sheila Jackson, 83, were in their home when the blaze was set alight in St Helens at around 12.40am on Tuesday.

Emergency services scrambled to on South John Street and the couple were rushed to hospital.

Sadly, Peter died yesterday while Sheila passed away just this morning from her injuries.

A joint investigation between Merseyside Police and Merseyside Fire and Rescue Service was carried out following the incident where it was determined an accelerant was used to start the fire maliciously.

It is believed to have been carried out by a third party, the police force added.

Cops appealed for anyone with information to come forward, particularly if residents live in the area of South John Street.

Police also urged locals to try and recall if they saw or heard anything suspicious at around the time of the incident.

Detective Chief Inspector Steve McGrath, who is leading the investigation, said: “Firstly, I want to express my condolences to the family of Mr Greener and Ms Jackson as this tragic time and we have specialist officers in place to support them.

“This is a truly shocking incident and I’m sure that the community and everyone in Merseyside will be utterly appalled at what has happened.

“It’s difficult to comprehend how someone could deliberately start a fire while two elderly people are inside the home. It’s absolutely sickening, and we are determined to find the person or people responsible.

“An investigation is ongoing as we look to establish exactly why this has happened and we are appealing for anyone with information to come forward.

“If you live in this community and saw or heard something suspicious at any point during this evening, please let us know as a matter of urgency.

“Also, if you have CCTV or a smart doorbell, take the time to review any footage you have to see if you captured anything that could prove to be significant. Even if it appears to be a small detail, it could end up being vital to our inquiries.

“I would also ask that any drivers who have dashcam footage and were in the area of South John Street and Parr Street between midnight and 1am to contact us if you have captured anything significant.”