A veteran in Quebec has offered a $1,000 reward to anyone who identifies three men — including a Montrealer — photographed urinating on the National War Memorial in Ottawa on Canada Day.

The Second World War veteran, who lives in Montreal, came forward when he heard that one of the three revellers was from his city, according to Sid Stevens of Montreal's Sun Youth Organization.

The 80-year-old veteran, who wishes to remain anonymous, has a personal connection to the monument, Stevens added.

Ottawa police said the photographer, retired Canadian Armed Forces Maj. Michael Pilon, told them that one of the men was from Montreal. Police in the Quebec city said they were not investigating the incident, but would provide help if asked.

The photographs, taken by around 11 p.m. ET on July 1 after a fireworks display ended, have prompted outrage across the country.

"It's uncalled for," said Stevens. "It's probably a couple of guys that had a few drinks too many. But it's created such an awareness, and a lot of people are expressing their anger."

Ottawa police are seeking the three suspects and have urged anyone with information about them to come forward.

If the men are found, they could face charges under the Criminal Code, the National Capital Commission rules or city bylaws.

Ottawa Det. Mike Walker said police have contacted Pilon and will ensure charges are laid if the suspects are found.