Two teenagers were seriously injured Friday afternoon in a ramming attack near the entrance to the Gush Etzion town of Elazar, Magen David Adom (MDA) reported.
The victims have been identified as a 19-year-old sister and her 17-year-old brother from Gush Etzion.
The boy was seriously injured, while his sister was moderately injured.
Both victims were treated by MDA and have been transferred to Jerusalem hospitals.
Professor Yoram Weiss, Medical Director at Hadassah Ein Kerem Hospital, described the boy's injuries as "very serious."
"He has a brain injury and a fracture in his skull," Prof. Weiss said. "His life is in danger."
The boy's sister suffered injuries and is currently hospitalized in the trauma department at Shaare Zedek Medical Center.
Shaare Zedek Director-General Ofer Merin said: "A young woman of about 20 arrived here after being injured in a ramming attack. She arrived generally in good condition, fully conscious and with injuries we are used to seeing from ramming attacks, mostly scrapes and injuries to her limbs. Her condition is light to moderate, and she will require hospitalization."
The terrorist has been neutralized.