A group of New Zealand firefighters have performed a powerful haka in memory of their fellow American first responders who lost their lives in  the 2001 attacks on the World Trade Centre.

America's Ambassador to New Zealand, Scott Brown, shared a video of the haka online and it has since garnered more than 300,000 views. 

"Thank-you to the [Fire and Emergency New Zealand] crew for performing this incredible [haka] in Auckland yesterday in memory of the 1st responders who were lost during the [September 11] attacks," Ambassador Brown tweeted. "An appropriate and uniquely Kiwi way to remember the bravery and sacrifice of 9/11 first responders."

TVNZ reported that Wednesday's tribute in Auckland took place in front of three visiting Fire Chiefs from the New York Fire Department, John Buckheit, Chief Howard Hill and Battalion Chief David Morkal.

Some 200 firefighters then climbed the Sky Tower in tribute to the more than 340 firefighters who lost their lives responding on September 11, the local media reported. 

The tribute was performed in front of visiting American firefighters under Auckland's Sky Tower.