By Dan Williams JERUSALEM, June 15 (Reuters) - Cyprus believes it thwarted a Hezbollah plot to attack Israelis or Jews, its foreign minister said on Monday, after bomb-making material was found in a house on Cyprus. A 26-year-old Lebanese-Canadian man is in custody related to the discovery of a massive amount of ammonium nitrate in the basement of a home in Larnaca last month. Earlier this month, Israel said Cyprus had told it that the fertilizer was to be used for bombs by Hezbollah, a Lebanese militia hostile to Israel, and that Israelis or Jews on Cyprus may have been intended targets.