CORK stands in solidarity with Manchester after the 'unimaginable tragedy' of Monday's attack.
The Union Jack flew over City Hall yesterday, while the Lord Mayor of Cork, Cllr Des Cahill, opened a book of condolence for the victims this morning.
The attack at a concert by US pop star Ariana Grande left 22 people dead, including an eight-year-old, and dozens injured.
Britain remains on a critical terror alert today, with Prime Minister Theresa May indicating that a 'wider group of individuals' could have been involved in the Manchester Arena blast.
The Lord Mayor of Cork said that flying the flag over City Hall is a sign of solidarity between the cities.
"It is an unimaginable tragedy," he said.
"To think that this attack targeted so many children and young people is just unimaginable.
"Ireland has very strong links with Manchester and this gesture is a way of showing that. Cork is standing with the people of Manchester - it is a show of unity and solidarity."
He paid tribute to those caught up in the attack.
"Our thoughts are with the victims and their families. It is about solidarity with those who suffered physical injuries and, of course, the mental scars that will stay with people forever."
Cork teenager Kiara McKelvey was caught up in the attack. Her family reported that she is recovering well from the shock and is in 'good hands.'
The 15-year-old from Tower has lived in Manchester for two years.
Her uncle, Lloyd Creagh from Harbour View Road, told the Evening Echo that his niece is in shock after the ordeal.
"She went into school today, there's a counselling service there," he said.
"She's in good hands, but it will take her a while to get over."