Police are undertaking daily patrols outside a primary school in Cardiff after parents fought in the playground.
South Wales Police confirmed that its community support officers have attended the Welsh-language Ysgol Glan Morfa, Splott, all this week. It comes after two families came to blows and a subsequent playground ban resulted in staff being "threatened" and "physically manhandled".
Sian Wyn Thomas, a teacher, has since written to parents, saying poor behaviour would not be tolerated. In the letter, dated 17 October, Ms Thomas wrote: "We have had some unpleasant incidents involving foul language and aggression by a small minority of parents.
"Last Friday was the worst so far, with two families fighting on the schoolyard."
South Wales Police confirmed its officers were continuing to patrol the school twice a day. Cardiff Council said parents bringing their children to school – which has about 400 pupils – should remain at the gates, before being escorted into the building by staff.