FRU acting chiefe executive Berlin Kafoa said Master Eroni as he was known at the FRU would be sorely missed for his dedication and contribution.
In 2009, Vereivalu was appointed coach for the FORU U19 team to Samoa and the U20 team to the 2009 and 2010 Junior World Cup in Japan and Argentina.
His last appointment with the FRU was as Assistant Coach for the Telecom Fiji Warriors Team to the 2014 Pacific Rugby Cup.
"Our prayers and thoughts are with his family and the Naitasiri Rugby Union in their time of sorrow as we cannot even begin to imagine what they are going through and how difficult it must be for all of them," Kafoa said in a statement last night.
"Although it's difficult today to see beyond the sorrow, we do hope that looking back in memory help comfort his family.
Our deepest sympathies go out to the Vereivalu family and we pray that God give them the comfort and peace that they seek and may the soul of their loved one rest in peace."