"We are all shocked and saddened with the news of Phillip's passing. On behalf of the entire cricket community, I would like to extend my sincere condolences to his family and friends," ICC Chairman N Srinivasan said.
ICC Chief Executive David Richardson said the whole of cricketing fraternity was devastated by the news.
"He was a naturally gifted player who entertained many with his attacking approach to the game. All those who play, have played or are in any way connected to the game are devastated by the news. Our thoughts are with all those affected by this tragedy at this difficult time," said Richardson.
Extending his deepest sympathy to Hughes' family, friends, colleagues, team-mates and opponents alike -- and to Cricket Australia for their loss, NZC Chief Executive David White said, "Cricket is a family. Quite apart from its super-competitive edge, it is a game of kinship, mateship and friendship; of camaraderie and community.
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"To lose one of our own in such tragic circumstances is unthinkable, and our thoughts are with those who are close to Phillip; who know him, or have simply enjoyed the wonderful brand of cricket he brought to the game.To those people, and all others who share in his loss, may I pass on our heartfelt condolences."
Born in Macksville, New South Wales, Hughes made his Test debut against South Africa in Johannesburg in 2009 and in his second Test match itself, in Durban, he became the youngest cricketer to score two centuries in a Test.
Hughes played 26 Test matches, scoring 1,535 runs, with three centuries to his credit and 25 One-Day Internationals, scoring 826 runs including two centuries -- most recently in the victory over Pakistan in Abu Dhabi in October. He also played one T20 International.