Two women have been arrested in connection with the arson attack on a car in Maghull in the early hours of Monday (5 August).
Just after 1am, a report was received to say a black Land Rover Discovery car had been set on fire on Highgate Road by two men, who used fireworks to ignite the vehicle.
It is believed the offenders then returned to a car parked in nearby Oakhill Road and made off from the area.
Emergency services attended and as the neighbouring property was affected by the smoke, and due to fears the fire could spread, the two elderly occupants evacuated their home as a precaution.
During the incident one of the residents, an 86-year-old woman, suffered a head injury. She was taken to hospital for treatment but sadly died on Monday.
A 21-year-old woman from Kirkby and a 22 year-old woman from Huyton have been arrested on suspicion of conspiracy to commit arson with intent to endanger life and released on conditional bail.
An investigation is ongoing and anyone with information is asked to contact Merseyside Police social media desk via Twitter @MerPolCC or Facebook Merseyside Police CC. You can also call 101 quoting incident reference 19100430769 or contact the independent charity Crimestoppers anonymously, on 0800 555 111 or via their online form at: https://crimestoppers-uk.org/give-information/give-information.