A seven-year-old child has been killed and other children injured in a stabbing at a primary school in Croatia.

The country’s health minister said a teacher was also injured in the knife attack in Zagreb on Friday. The alleged attacker, a 19-year-old man and former pupil, was arrested at the scene, local media reported.

Photographs showed police officers, ambulance staff and forensic teams outside the building.

Croatian Prime Minister Andrej Plenkovic said he was “horrified” by the incident at Precko Elementary School.

Two adults and five children are in hospital with injuries, according to the health ministry.

Speaking to reporters outside the children’s hospital, Health Minister Irena Hrstic said the attacker entered the school before stabbing staff and pupils.