Sgt. Andrew Doiron was killed in Iraq on Friday, the first casualty of Canada's mission against ISIS. On Tuesday, he returned home.

Doiron was shot and killed in what has been called a "friendly fire" incident as his special forces unit was on its way back to an observation post. Three other Canadians were wounded in the firefight.​ 

Officials with the Kurdish peshmerga have blamed the Canadians for the shooting, a claim Canadian officials have denied. Canadian officials have said the Canadians were not at fault and had been at the same position earlier in the day and informed the Kurds they would return later that night.

What is not in doubt is the outpouring of support for the soldiers and their families in the wake of the incident.

Many gathered on windy overpasses and dusty shoulders to say goodbye to Sgt. Doiron

Andrew Doiron highway of heroes 3

(Lars Hagberg/The Canadian Press)

Andrew Doiron Highway of Heroes

(Martina Fitzgerald/CBC)

Police officers paid their final respects

As did firefighters

Highway of heroes Andrew Doiron

(Fred Thornhill/Reuters)

And soldiers

And politicians

Canadians gathered to wave flags

Andrew Doiron highway of heroes

(Lars Hagberg/Canadian Press)

Others wore them

 Andrew Doiron highway of heroes 2

(Colin Perkel/The Canadian Press)

They all came to honour Andrew Doiron 

Sgt. Andrew Joseph Doiron

Sgt. Andrew Joseph Doiron, seen here in an undated photo, served as an adviser in the Special Operations Regiment at Garrison Petawawa, Ont. (Facebook)

Sgt. Andrew Joseph Doiron

Sgt. Andrew Joseph Doiron was originally from Moncton, N.B., and attended Algonquin College in Ottawa before joining the Canadian Forces, according to his Facebook page. (Facebook)

With files from The Canadian Press