A memorial plaque has been unveiled in Berkeley, California, honouring the students who lost their lives when an apartment balcony collapsed in June 2015.
Irish students Eoghan Culligan, Niccolai Schuster, Lorcán Miller, Eimear Walsh and Olivia Burke, and Olivia's Irish-American cousin Ashley Donohoe were all killed in the collapse.
Seven other Irish students were also injured in the incident.
Family members of three of those who died attended today's plaque unveiling which was organised by the Consulate General of Ireland to the Western United States, the Irish Immigration Pastoral Center and the City of Berkeley.
The plaque is located at the southwest corner of the Martin Luther King Jr Civic Park.
The unveiling was co-hosted by Ireland's Ambassador to the United States, Dan Mulhall, and the Mayor of the City of Berkeley, Jesse Arreguin.
Speaking ahead of the memorial event, Ambassador Mulhall said: "The Berkeley balcony collapse of June 2015 was a terrible tragedy and one which had an enormous effect on Ireland.
"The depth of grief, shock and sorrow was immense – six young lives so tragically and prematurely ended and serious injury inflicted on so many."
Mr Arreguin said: "The balcony collapse was one of Berkeley’s darkest days, but in the aftermath it has brought us closer together.
"I want to thank the first responders for their heroic response during that fateful night, and to everyone who has been involved in advocating for the creation of improved building codes to prevent such tragedies from happening again."