First of Long Island Corp. of Glen Head said higher net interest income was mainly responsible for an 8.9 percent increase in net income in the first quarter.

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The parent of the 41-branch First National Bank of Long Island said it earned $6.5 million or 46 cents a share in the three months ended March 31. Net interest income, the difference between the revenue generated from a bank's assets and the expenses associated with liabilities, rose by 10.6 percent to $17.8 million.

Total assets were $2.8 billion on March 31, up 16 percent from a year earlier.