Natick, Mass. - BJ's Wholesale Club reported an increase in net income and a double-digit gain in net sales for its fiscal first quarter, ended May 1.

Net earnings were $26.1 million, compared with $24.3 million year on year.

Net sales were $2.55 billion in the quarter, an increase of 12.9 percent. Comp-store sales increased by 7.8 percent, including a contribution from sales of gasoline of 3.6 percent.

Excluding the impact of gasoline, merchandise comp-store sales increased by 4.2 percent.