A 13-year-old boy is fighting for his life following an incident that took place at an Enniskillen school.
Young Oisin McGrath was left with serious injuries at St Michael's College on Monday afternoon.
The incident was reported to the PSNI at 2.45pm.
The boy was initially taken to the South West Acute Hospital in Enniskillen. However, his injuries were so serious that he was later transferred to the Royal Victoria Hospital in Belfast.
A spokeswoman for the Belfast Trust described the boy's condition as critical last night.
Details about the incident are still unclear.
However, it was reported that a 17-year-old boy was arrested and later released on bail. PSNI Detective Inspector David Hallawell said that a 17-year-old boy detained by police was later released on bail pending further inquiries.
Oisin is well-known within the local community from his and his family's involvement in their local GAA club. Last night Belcoo GAA club made an appeal via its Twitter page for people to join them in praying for Oisin.
The club said young Oisin is the son of their secretary Sharon and described him as a "key member" of their under-14 side.
"The club asks all its members to keep Oisin McGrath in their thoughts and prayers as he is currently in the Royal Victoria Hospital," the club said in the statement. The club also announced last night that training, which had been due to take place today, had been cancelled as a mark of respect.
A special Mass is due to be held for Oisin this evening at the Oratory at 7.30pm.
Ulster Unionist MLA Tom Elliott described the incident as "very sad" and offered his best wishes to the boy's family, saying he hopes he gets well soon.
Messages of support were posted on the Impartial Reporter's Facebook page, all offering best wishes and thoughts to the McGrath family.
They described the incident as "every parent's worst nightmare", as well as urging Oisin to "keep fighting", adding "the whole of Belcoo and Fermanagh are thinking of you!! Xx".
Another well-wisher who knew the family described Oisin as "an absolute gent".