The Canadian soldier killed in Iraq last week was laid to rest in Ottawa Saturday.

Family, along with friends and other supporters, honoured Sgt. Andrew Doiron at a service at Ottawa’s Notre-Dame Cathedral on Saturday morning.

Reporting from outside the church, CTV Ottawa’s Annie Bergeron-Oliver said the atmosphere was “peaceful” and “sombre.”

Members of the military carried Doiron’s urn into the cathedral, and a few members of the public and media braved freezing rain to pay their respects outside the ceremony. Around the capital, Canadian flags flew at half-mast.

Doiron’s body was returned home Tuesday. His final resting place is at the National Military Cemetery in Ottawa.

The 31-year-old was killed when Kurdish allies mistakenly fired at him in a so-called friendly fire incident in Iraq on March 6. He was Canada’s first casualty since forces were deployed to help in the fight against Islamic State militants.

Three other Canadian forces members were also wounded in the incident.

Stephanie Learmouth, a friend of Doiron, told CTV News Channel that he had been "passionate," "determined," and that "he knew what he wanted, he was honest, he was true to his word."

The Moncton-born Doiron did three tours of Afghanistan during his 13 years in the military.

In an obituary, Doiron’s family said their son “lived with a warrior mentality” and was an “accomplished human, a true friend, a mentor and a hero.”

“We know that Drew’s dedication, qualities, inspiration and strength will carry on in his memory.”

Outside the cathedral on Saturday, one mourner said it’s important to honour the sacrifice of Canada’s fallen soldiers.

“Whether it’s friendly fire or combative fire, we still need to remember them and honour them for the work that they’ve done for us,” he said.

Another attendee called it a “privilege” to be able to stand along the procession route. “It’s the least that I can do to show my gratitude to him.”

In a recent statement, Doiron’s family asked for privacy and space to grieve. "Our son gave all and through his loss, we gave all."

The family has also said that they will not be accepting money or flowers in Doiron’s name. They urged anybody wanting to make a donation to consider giving to Wounded Warriors Canada, a group dedicated to helping Canadian Forces members who have been injured in their service to Canada.

With files from CTV Ottawa’s Annie Bergeron-Oliver