More pupils have tested positive for coronavirus at a school in Gateshead.
Last week, it was revealed that a Year 9 student at St Thomas More Catholic School, in Blaydon, had been diagnosed with Covid-19 and other students who had come into contact with the youngster were asked not to return to class until they had completed their isolation period in line with guidance.
Since then, three more pupils have tested positive for the virus - one more in Year 9 and two in Year 13.
The school has decided to carry out a deep clean of the Year 13 zone and all students from that year were asked to work from home on Friday while the cleaning took place.
In a letter to parents on Thursday, headteacher Jonathan Parkinson said: "I am writing to confirm that we have had a further confirmed case of Covid-19 in Year 13 today.
"All pupils that have been in direct contact with the confirmed case have been contacted and will not return to school until they have completed their isolation period.
"As a further control measure we have made the decision to carry out an additional deep clean of the Year 13 zone which means Year 13 pupils are required to work from home on Friday 18th September. Thank you for your ongoing support."
Letters, which were sent to parents confirming the four cases, said other pupils in the school should continue to attend as normal, so long as:
Mr Parkinson added: "I can assure you that we have followed all guidance issued to us by the local health protection team and acted accordingly."
A number of schools across the region have been affected by coronavirus after they reopened earlier this month. Some asked year groups or bubbles to isolate at home, while others decided to close for a deep clean.