Ysgol Maesydderwen will remain closed today following a late development in the police investigation into a telephone threat made in relation to the school.

The Ystradgynlais comprehensive school had earlier indicated it would reopen as normal. However, in an update issued late on Monday night, Dyfed-Powys Police confirmed a decision had been made not to reopen today (Tuesday, March 3).

Police were called to the school at around 10.45am on Monday following a report of a threat made over the phone.

As a precaution, the school implemented its full lockdown procedure while officers attended and enquiries were carried out.

Police confirmed there were no reports of anyone injured and that all pupils and staff on site were “safe and secure”.

Pupils were later released early. Buses were brought to the school ahead of schedule, and parents were advised that students not travelling by bus would need to be collected by a parent or guardian.

In a statement issued on Monday afternoon, Dyfed-Powys Police said: “All pupils and staff were released safely from Maesydderwen Comprehensive School in Ystradgynlais this afternoon.

“Police remain at the scene whilst diligent enquiries into the telephone threat continue, but no arrests have been made at this stage. There is no evidence of any ongoing risk to pupils or staff.

“Police patrols will be carried out in the coming days to provide reassurance to pupils, staff, parents and the community.”

However, in a further update late on Monday, police said: “Following a development in the investigation into a threat made over the phone in relation to Maesydderwen Comprehensive School, a decision has been made by the school not to reopen tomorrow (Tuesday, March 3).

“There will be a police presence at the school as officers continue to investigate, and we will provide updates whenever possible.

“Parents and carers will continue to receive updates around the reopening of the school directly through the school app.”

In an earlier social media post, the school thanked pupils for the “mature way they handled today’s difficult situation” and praised staff for acting professionally in implementing lockdown procedures.