A carer accused of deliberately crashing a car to kill his elderly passengers will remain in custody after being charged with manslaughter.

Stuart Daryl Gray, 61, faces two counts over the deaths of his client, Clive Millers, 83, and Clive’s sister, Norma Dutton, 85, who both died at the scene of the crash in Brooloo, Queensland, on Monday.

The single-vehicle crash occurred just before 2 p.m., when the Suzuki Kizashi driven by Gray slammed head-on into a tree at the intersection of Callemonda Road and Mary Valley Road in the Sunshine Coast hinterland, about 60 km northwest of Nambour.

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Acting Superintendent Brad Inskip confirmed that the two victims were related and that Gray was employed as their carer.

Police allege the crash was intentional.

Norma’s neighbour, Lee Hurren, said she was a popular Gympie local.

“Very active for an 85 year old.

“She does her mowing twice a week of her yard, plus the gardening.

“Active in the social areas of Gympie.”

Gray remains under police guard in hospital after suffering serious injuries in the crash and was mentioned in Gympie Magistrates Court on Thursday.

He did not apply for bail.

Police are continuing their investigation and urging anyone with information to come forward.