Police have provided an update into a murder investigation which has been launched in a village on the Nottinghamshire border.
Freda Walker, 86, has died after she was attacked in her home, along with her husband Ken, on Saturday, January 15.
Police have confirmed Mr Walker remains in hospital in a critical condition as of Monday, January 17.
The investigation is being carried out by Derbyshire police.
Nottinghamshire Live asked the force if the incident may be linked to another earlier this month, in the village of Trowell, where an elderly couple in their 80s were attacked in their home by an intruder on January 6.
Nottinghamshire Police officers have been spotted in Stoney Lane in the village on Monday, January 17, as part of "ongoing investigations" into what happened in Trowell.
However, Derbyshire Constabulary said they were speaking to other forces to look at any similar incidents.
But police in Derbyshire said no formal links have been made as of yet.
A spokesperson for Derbyshire Constabulary said: "The update this morning is that the man involved remains in hospital in a critical condition and we are still appealing for anyone with information - including CCTV or dash cam footage if there were in the area - to come forward.
"We are speaking to other forces in the region to look at any other similar incidents there may have been but no formal links with any other cases have been made at this time."
A fundraiser has since been set up for the Walker family to help them financially after the tragic incident.
A woman who lives in a bungalow near Station Road, where the incident took place, told Derbyshire Live that Mr Walker was a councillor on Shirebrook Town Council.
Bouquets of flowers were left at the scene by friends. One tribute described Mrs Walker as someone "who would help anyone without hesitation".
Anyone who may be able to help detectives with their inquiries is asked to contact Derbyshire Police, including reference 240-150122.
They are also being invited to get in contact by social media or anonymously via the independent charity Crimestoppers, on 0800 555 111 or by visiting www.crimestoppers-uk.org.
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