"Shocked by the news of Kawa Leauma's passing," Blanco tweeted. "What an injustice ... A fabulous boy that I was lucky enough to meet a few weeks ago. My sincere condolences to his family, friends, colleagues and to all of Spanish rugby. I accompany you in the feeling."
Leauma played for a number of Auckland clubs, including its representative sevens team, before moving abroad, and the Mount Wellington and Papatoetoe clubs were among those to pay their respects to Leauma on social media.
"These posts aren't easy to do and this one in particular is pretty upsetting as this club acknowledges the passing of Kawa Leauma," Mount Wellington's Facebook post said.
"Kawa was an integral part of our Mount Wellington Premier side, great player and humble both on and off the field and we enjoyed seeing him continue to thrive beyond his time at our club. He will be sorely missed by many of our community and we extend our sincere condolences to his wife and family as they navigate this tough time in a foreign country."
Papatoetoe's tribute said Leauma was "another brother gone way too soon".
"Our sincere condolences go out to the family and friends of Kawwa (sic) Leauma who passed away in a tragic accident whilst living abroad in Spain," the club's Facebook post said.
"Rest in love brother Kawwa."
Another brother gone way too soon 😥 Our sincere condolences go out to the family and friends of Kawwa Leuma who passed...
Posted by Papatoetoe Rugby Football Club on Tuesday, December 21, 2021
Leauma was in the Spanish squad ahead of their clash with the Netherlands on Sunday and had been hoping to make his official debut in the World Cup qualifying game, won 52-7 by Spain, after completing the necessary three years of residency.
He had made one unofficial appearance for Spain against Italy in October, but was ultimately left out of the team for the match in Amsterdam, a World Cup qualifier, because of questions over his eligibility.