Ross Hanlon has been missing since Friday
Dundalk IT's Student's Union held a vigil "to show support for Ross Hanlon, his family, and friends".
21-year-old Ross Hanlon has been missing since last Friday.
He was last seen outside Flex nightclub in the Augartenbrucke district of Vienna, early on Friday morning.
Ross, who is a business student in DkIT,
Posting on Facebook this morning, DkIT's student union said:
"This morning we held a vigil to show our support to Ross Hanlon, his Family
"We’re inviting students and staff to come along at any stage to leave a support message and to light a candle if they wish, in the hope of a safe return home for Ross."