The eight-year-old grandson of a woman killed after plunging 65ft on a mobility scooter in Benidorm is reportedly in intensive care.
The unnamed British grandmother, 58, took a sudden turn over a steep hillside and tumbled down the rocky terrain.
Firefighters took two hours to reach the patient in the Natural Park of Serra Gelada following the incident at around 4.15pm on Wednesday.
She was not breathing and attempts to resuscitate her failed.
Investigators are looking at a variety of possibilities, including that the woman fainted, was driving too fast or that the vehicle suffered a mechanical failure.
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Initial reports suggested a young boy had been treated for minor injuries - but it has since emerged he is fighting for his life at Alicante General Hospital, reports Informacion.
The extent of his injuries have not been made public.
The boy is understood to have been travelling on the scooter but it is not clear if he managed to jump off before if went over the edge.
The speed they were travelling at going down the slope is being analysed, as is whether the scooter - believed to have been rented - met the legal safety requirements.
The woman is understood to have been returning to her hotel after visiting the hill's summit with her husband, 60, according to MailOnline.
He reportedly witnessed the incident and was injured as he tried to rescue his wife.
"The fire brigade was sent to the emergency with several vehicles, with the primary aim of rescuing the injured persons as quickly as possible," reports informacion.es.
"On arrival, the firefighters collaborated with the troops of the Local Police of Benidorm and Health Technicians SAMU, who performed resuscitation techniques on a woman, not obtaining positive results."
A statement from Benidorm Town Hall said the woman hit a wooden barrier "separating the road from the abyss".
Two years ago, councillors in the Spanish tourist hotspot voted unanimously to approve laws that imposed a 12mph speed limit on mobility scooters vehicles, with £430 fines for offenders.