The 13-year-old who was seriously injured during a car crash in Limassol in the early hours of Friday remained intubated in critical condition at Nicosia general hospital on Saturday.
The other person seriously injured, a 15-year-old passenger, is receiving care at the neurosurgical department of the hospital but is not in life-threatening danger.
The two minors were hospitalised on Friday following a car crash after the vehicle was being driven by another 15-year-old boy in the early morning hours in Limassol. The driver tested positive for alcohol.
The injured boys were sitting in the back of a single-cabin pick-up truck, with a 17-year-old as a passenger in the front.
They were driving on Ayios Therapontas-Alassa road at around 3.30am on Friday when, under conditions that are being investigated, the car fell 10-metres into a deep ravine.
Deputy chief of Limassol traffic police Emilios Kafas said the vehicle was stopped when it hit a large tree.
Fire fighters rushed to the scene and pulled the minors out of the vehicle.
The teenagers were transferred to the Limassol general hospital, where the two in the back were admitted. The younger boy was intubated and taken to Nicosia general where he remains in the intensive care unit. The two other two boys in the cabin, including the driver, were not seriously injured.
The minor who was driving the car tested positive after taking an alcohol test, Kafas said, adding that police are also looking into charges against the owner of the vehicle.
Police are investigating the exact causes of the accident.