Gap Inc has said that net sales increased 7% over the first quarter, with growth driven by Gap and Old Navy.

The company said net sales reached US$3.73bn from $3.49bn in the same period last year. Comparable sales rose 2% over the quarter.

During April, comparable sales rose 7%, while consolidated sales grew 5.2% to reach $1.21bn.

"We are pleased with our sales performance this month, led by our largest brands, Gap and Old Navy," said Glenn Murphy, chairman and CEO.

At Gap, sales grew 3% over the first-quarter, and 8% during April, while Banana Republic quarterly sales were flat and grew 1% during April. At Old Navy, quarterly sales grew 3% and were up 9% over the month.

The company expects diluted earnings per share for the first quarter $0.68-0.69, compared to $0.47 in the same period of 2012.