Volkswagen increased deliveries of VW brand vehicles to customers by 3.5% in September to 290,000 units worldwide, the company said, according to Reuters.

"The figures prove that our model offensive in Europe is increasingly convincing customers," VW brand sales chief Georg Flandorfer reportedly said in a statement - deliveries in the key domestic German market increased 8.7% to 50,500 vehicles last month.

In China, VW's largest foreign market, the brand saw a drop in deliveries of 7.5% to 46,500 vehicles last month as carmakers waged a fierce price war, but Reuters noted that Volkswagen, once the overwhelming market leader in China but now struggling to hold onto its position, said it remained top automaker in that country.

In the first nine months of the year, VW brand deliveries worldwide declined by 0.7% to 2.26 million vehicles, the report said, adding that the group sold 98,500 VWs in European markets outside of Germany in September, a gain of 8.6%.

Combined deliveries in South America and South Africa, key emerging markets for VW, grew by 8.7% to 43,000 vehicles.

"In the USA, we succeeded in reversing the (negative) trend with the new Jetta and Passat models," Flandorfer reportedly said.

VW said earlier this month that VW brand sales in the United States rose 3.7%, boosted by a surge in demand for the two new models, Reuters added.