An Irish citizen is believed to have been among more than 70 people killed in bomb attacks in Uganda as they watched the World Cup final.
The Department of Foreign Affairs said it is providing consular assistance to the family of the woman, thought to be aged 50, and appealed for privacy.
Foreign affairs minister Micheál Martin, who has just returned from a visit to the East African country, said he was horrified and saddened by the loss of life.
“I know that the mood in Kampala yesterday would have been one of great joy, with celebrations to mark the conclusion of Africa’s first World Cup,” Mr Martin said.
“The peace of those celebrations has been cruelly shattered by this heinous terrorist attack which I utterly condemn.
“On behalf of the government and people of Ireland, I send heartfelt sympathy to the government and people of Uganda, especially to the bereaved and I offer my best wishes for a swift recovery to the injured.”
The minister said the Irish embassy in Kampala was offering consular assistance to the relatives and friends of those who may have concerns about the welfare of Irish citizens in Uganda.