Officials said a fourth grade student died suddenly Sunday.
Nico's elementary school, where the boy was the voice of the afternoon announcements, is providing grief counselors for classmates and teachers.
Our thoughts and prayers are with Nico's parents and his family, and we stand ready to support each of them in every way possible in the time ahead.
According to Reed, Nico had been seen at a good local hospital in Buffalo-site of the youth hockey tournament-and diagnosed there with flu.
It was unknown whether Nico and his brother were vaccinated.
The Connecticut Roughriders hockey club posted a bulletin to its website this week warning parents about the dangers of influenza.
Mallozzi, a student at West School, left the hockey tournament early because he felt sick.More news: Leading Kosovo Serb politician shot
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"Whether he was grabbing kids outside to get together to play a football game or in the hallways or in the library, everyone in the building knows Nico, knows who he is and just loved him", said Dr. Bryan Luizzi, the school superintendent.
I know you join me in keeping them in our hearts. His parents chose to take him home, but rushed to the Women & Children's Hospital of Buffalo, New York, when he took a turn for the worse.
Members of the community also expressed their condolences to the Mallozzi family via Twitter. A New Canaan health official reported to the Advertiser information that he received from a New York State medical examiner.
"The men and women of the NCPD express our deepest condolences to the Mallozzi family with the tragic passing of their son Nico".
"We will never forget you, Nico", the message says. "We're really going to miss him and remember him very fondly".
A was set up for Mallozzi's family and raised more than $137,000 in one day. "At this point, it has been confirmed that Nico had been diagnosed with Influenza B, a strain of the Flu that is now spreading in the Northeast".