A Child Rescue Ireland (CRI) Alert issued by Gardai in Roscommon has now been cancelled.
All concerned have been located safe and well by the Police Service of Northern Ireland in the Enniskillen area.
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Earlier this morning a massive search had been launched with gardai saying they were 'very worried' about 8 year old Killian Gregg and his sisters Elisha and Derbhla aged 6 and 2.
Killian and Elisha were wearing school uniforms of dark navy jumpers with sky blue shirts and black trousers.
It's believed the kids are with their mum - 41 year old Fiona Gregg and were last seen at their home in County Roscommon at around 3pm.
Superintendent David Taylor has made this appeal:
