Simon Chase, who was one of the two Britons killed in a suicide bomb and gun attack in Kabul yesterday, was "well-known and well-respected" in the local community.
Mayor of Limavady Gerry Mullan, who extended his condolences to Mr Chase's family, said:
"There is cloud that has descended upon the local community who are very shocked and saddened by his loss," said the SDLP councillor.
"He was a well-known and well-respected figure in the community."
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"My sincerest apologies to everyone who purchased tickets and were planning to come to the upcoming shows."
His comments at the Defence and Security Forum on Monday came after a £20 billion black hole in the budget for the next decade emerged.