WOLFSBURG, Germany - Volkswagen says the 11 million vehicles worldwide that contain software involved in the emissions-rigging scandal include some 5 million cars made by its core Volkswagen brand.

The Volkswagen Group includes 12 brands, and the company has yet to detail fully what cars where were involved. A Volkswagen statement Friday said some diesel models and model years - such as the sixth-generation Golf, seventh-generation Passat and first-generation Tiguan - are equipped exclusively with the EA 189 engines in which it says there are "discrepancies."

It didn't detail where in the world the 5 million Volkswagens were sold.

Volkswagen brand chief Herbert Diess says "we are working at full speed on a technical solution that we will present to partners, to our customers and to the public as swiftly as possible."