A picture taken on May 17, 2023, ahead of Spain's local and regional polls, shows a school street sign in Allepuz, near Teruel, northeastern Spain. (PHOTO / AFP)

MADRID — A teenager wounded three teachers and one pupil in a stabbing in a high school in Jerez de la Frontera, southern Spain, police said.

One of the teachers will undergo surgery, while the other three victims suffered light wounds, a source from Andalusia's health services said.

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Police said the attacker had been detained.

Canal SUR television channel showed parents congregating outside the school gates. A pupil's mother told the station the attacker had wielded two large knives from his backpack inside a classroom and attacked fellow pupils and teachers at about 8:15 am (0615 GMT) local time, telling them he would kill them.