Gardaí have renewed their appeal for information in relation to a 41-year-old man who has gone missing in Dublin.
Jon Jonsson, a father of four from Iceland, was last seen in the Whitehall area of the city at around 11am on Saturday 9 February.
Twelve members of Mr Jonsson's family have travelled from Iceland to help search for him.
Brother of the missing man, David Karl Wiiem said his brother had been in Dublin with his fiancee for a poker tournament and a general visit to Dublin.
Speaking on RTÉ's Today with Sean O'Rourke he said he had never gone missing before and this was "out of character" for him.
Mr Jonsson arrived in Dublin on Friday 8 February. He left his hotel, the Bonnington Hotel, shortly before 11 o'clock the following Saturday morning.
Mr Wiiem said they have been able to track his brother's movements with the help of CCTV. He said he was last sighted walking up the Swords Road close to Highfield Hospital.
Mr Wiiem said he left the hotel without a passport, wallet and phone. He said if his brother had cash on him it could have amounted to a "few thousand euro" which he said would have been for the poker tournament.
Mr Wiiem said his brother's fiancee had gone down to the bar to have a coffee and when she returned to the room Mr Jonsson had left. He added that it wasn't known why he left the hotel.
Mr Jonsson's fiancee later reported him missing.
Mr Wiiem said to his and his family's knowledge his brother had been in good physical and mental health and he said he had no history of any mental health issues.
He said SAR (Search and Rescue) specialists from Iceland have assisted in setting up a specialist search operation which has seen them search "100s of kilometres", hanging up posters of Jon. He added that they had a team in Iceland focusing on social media. He said this approach was very common back home [in Iceland].
'We will stay in Dublin as long as we need to. We are not leaving without our brother.'— Today Sean O'Rourke (@TodaySOR) February 21, 2019
David Karl Wiium, the brother of missing Icelandic tourist Jón Jónsson, spoke to @TodaySOR today about the family's ongoing search. #JonJonsson @ThorunnJons @RTERadio1 @rtenews pic.twitter.com/YGqqmzesfy
A team of SAR specialists and locals are due to take part in a search on Saturday. Mr Wiiem said his family would stay in Dublin for as long as they needed and added they would not be leaving without his brother.
He said his family were extremely grateful for the support from people in Dublin and said they have had offers of help in searching, transportation, and offers of accommodation.
Mr Jonsson is the eldest of five siblings. His brother said it has been a very hard time for his family and also for their community back home in Iceland.