The Police Service of Northern Ireland were informed by their counterparts in Lyon that a man in his 60s collapsed during the Group C encounter at Parc Olympique Lyonnais.
We have sadly received confirmation from French Police tonight that a NI fan has died at the Stade de Lyon during the NI v Ukraine match— PSNI (@PoliceServiceNI) June 16, 2016
We understand the man who is aged in his 60s collapsed during the game. Local PSNI officers have been in touch with his family in Belfast.— PSNI (@PoliceServiceNI) June 16, 2016
The death is the second tragedy to befall the country's followers in France, after 24-year-old Darren Rodgers was killed in an accident in Nice last weekend.
Northern Ireland's fans paid an emotional tribute to Rodgers in the 24th minute of their game against Ukraine.
Goals from Gareth McAuley and Niall McGinn sealed the country's maiden win in what is their European Championship debut and first major tournament appearance since the 1986 World Cup in Mexico.