Berlin  - Lower Saxony may buy 5 per cent more of carmaker Volkswagen if the state fails to win its battle with the European Union over special voting rights at the company, Premier Christian Wulff said Wednesday.

The European Union resumed Tuesday its assault on Lower Saxony's claim to special veto rights through its 20.1-per-cent stake in the carmaker. German corporate law normally reserves such rights to a shareholder with 25 per cent or more of a company.