North Wales Police have questioned two local youths in Wrexham on suspicion of manslaughter.
It comes as part of an investigation into circumstances surrounding the death of a 78-year-old woman, who died of a stroke shortly after her car was set alight.
Gillian Dudley Smith died at Wrexham Maelor Hospital after being taken in ill soon after her red Ford Fiesta car was attacked outside her home in the Orchards, Hightown, Wrexham on November 13th.
One of the youths was arrested and bailed last week, and was questioned along with another teenager on suspicion of manslaughter. Both have now been released on bail.
Police investigating a spate of car arsons in the Wrexham area arrested seven people over the weekend. Six have been released on bail and the seventh has been released with no further action.
A coroner has opened and adjourned an inquest after a 78-year-old woman died shortly after her car was set alight in a suspected arson attack.
Dorothy Dudley-Smith, from Hightown in Wrexham, died in hospital after being taken ill shortly after her car was set on fire on Tuesday.
A post-mortem carried out on Thursday at the Royal Liverpool University Hospital showed the cause of death to be a stroke, said acting coroner John Gittins.
North Wales Police have not confirmed whether the incident is related to a number of other vehicle fires in the area.