A 13-year-old girl has been charged with three counts of attempted murder after two teachers and a pupil were stabbed at a school.
The three people were treated in hospital for stab wounds but have now been released.
Pupils at Amman Valley School, also known as Ysgol Dyffryn Aman, went into lockdown just after 11.20am on Wednesday following the attack at the end of morning break in Carmarthenshire.
Amman Valley School, which is in the town of Ammanford, is a comprehensive with around 1,500 students aged between 11 and 18.
In a statement on the school’s website, headteacher James Durbridge said on Wednesday it had been a “very difficult day” for the school.
“It goes without saying that my thoughts are with the three individuals and their families, who have been affected by today’s incident,” he said.
“I wish to commend all staff and pupils for their calm and mature response during today’s lockdown.
“We are proud to have witnessed pupils embodying the school’s core values while supporting their peers and staff.”
Keep up with all the latest news from the UK and around the world by following Sky News
Meanwhile, a 15-year-old boy has been arrested and remains in custody on suspicion of making threats referencing the school attack, Dyfed-Powys Police has said.
Superintendent Ross Evans said: “Following [the stabbing incident], yesterday evening our control room received a number of calls reporting concerns about messages being shared on social media which had references to the incident here at Ysgol Dyffryn Aman.
“Officers swiftly carried out a warrant at the home of the person believed to be responsible for this content and a 15-year-old male has been arrested.
“He also remains in police custody while we investigate these allegations.”