Two teenage girls have been arrested on suspicion of planning to murder a teacher.
Gwent Police said the girls, 14 and 15, were arrested at Cwmcarn High School in south Wales on Thursday because of concerns about their behaviour.
Detectives said they were notified about the alleged plot by a teacher at the school.
A force spokesman stressed "no physical confrontation" had taken place.
The 15-year-old girl was arrested on suspicion of threats to kill, possession of a "bladed article" on school premises and conspiracy to commit murder.
It is believed a kitchen knife had been found in the girl's school bag.
Her 14-year-old friend was arrested on suspicion of conspiracy to commit murder.
More top news
The Government has previously described the new coin - which enters circulation tomorrow - as "harder to counterfeit than ever before".
The European bloc said that Russia should release hundreds of people it arrested at anti-government protests and rallies.
The singer was coy on which role he would be taking up, going only so far as to say he would not play a stormtrooper.