Northern Ireland football manager Michael O'Neill has said his squad was left in shock at the Manchester attack, as his players could have easily been at the Ariana Grande concert with their children.
The team are in the city for a training camp ahead of their friendly game against New Zealand at Windsor next week.
O'Neill described a sense of shock flooding through the camp as the true horror of the attack and its devastating consequences became apparent.
"Everyone was obviously deeply saddened," he said.
"Something like that our players would go to, they would go with their kids.
"It's a time for us to reflect and say our thoughts are very much with all those people that have unfortunately been involved."
Midfielder Oliver Norwood, who grew up in nearby Burnley and spent a lot of time in the city during his spell with Manchester United, said he found it difficult to talk about the tragic events.
"Manchester is like a second home for me," he said. "This is devastating.
"To think people and especially children going to a concert won't come home to their parents - it's sickening really."
He added: "Everybody was saddened when we heard about it, it's difficult to talk about... it's madness."