Specialist clothing retailer Gap Inc has today (4 October) booked a 6% rise in comparable sales during September on the back of gains at its North American divisions.

Net sales increased 8% to US$1.45bn for the five weeks ended 29 September, compared to $1.35bn the same period last year.

The San Francisco-based retailer saw comparable sales growth in all of its North American business units, with Gap recording a 5% gain, Banana Republic posting 4% growth and Old Navy booking a 10% increase in comparable store sales.

However, international comparable store sales declined 3%, against a 13% fall last year.

"In September, strong customer response to trend-right product across all brands helped us deliver continued positive performance in North America," said Glenn Murphy, chairman and chief executive officer of Gap Inc.

Year-to-date net sales increased 6% to $9.71bn, while comparable sales rose 5% compared to a 3% decrease last year.