Three people, including a 13-year-old boy, arrested after a shooting at a County Antrim school have been released on bail pending further inquiries.
Police said an air rifle was fired into the playground of Dunclug College about lunchtime. No-one was injured.
A boy was later arrested on suspicion of firearms offences. Two males, aged 17 and 40, were also arrested.
The school principal said about 30 or 40 pupils were in the playground at the time and had to be moved elsewhere.
Ruth Wilson said at least one metal pellet had struck the door of a gym during the incident at about 1310 BST.
"There were around 30 or 40 children out during 'junior' lunch involving mostly 12-year-olds. Most of the pupils were still inside getting their lunch," she said.
"We immediately cleared the playground without panic and thankfully, to our knowledge, no one was hurt. The children were moved to the other playground and police were called straight away.
"We believe the pellet was fired from outside the school fence from the direction of the Doury Road estate. There is no evidence to suggest they were firing towards any child."
She said that none of the children had to go home after the incident and there was no trauma.
"At our regular Wednesday assembly we will mention this tomorrow to reassure people that no one was hurt," said Mrs Wilson.
A sectarian motive for the shooting has been ruled out by police who carried out searches in the area on Tuesday evening.