A 'major incident' is said to be to have taken place at a school in Carmarthenshire.
The alleged incident is said to have taken place at Ysgol Dyffryn Aman, also known as Amman Valley School, in Ammanford in the west Wales county.
Video footage has shown an air ambulance landing at the secondary school, with dozens of police cars and worried parents reportedly scrambling to the scene.
Crowds of parents are seen waiting outside the school gates watching as emergency workers attend the incident. Worried loved ones can be seen texting and calling while standing on the pavement.
Dyfed-Powys Police have confirmed a presence and air ambulance are on the scene.
The alleged incident is said to have taken place at Ysgol Dyffryn Aman in Ammanford in the west Wales county
The Welsh language school has 1,800 pupile aged 11 to 18. The school is situated in the north of the Ammanford town centre, while the town itself is a few miles north-east of the western terminus of the M4.
Formers pupils include ex-Wales and British Lion rugby star Shane Williams and former MP Adam Price.
MailOnline has contacted the police and Welsh Ambulance Service.
This is a breaking story. More follows.