Aerial view of the new Nurburgring racetrack taken on July 9, 2009 in Nurburg, three days ahead of the German Formula One Grand Prix. AFP PHOTO / SASCHA SCHUERMANN

European Union competition regulators have stepped up their investigation into state aid granted to the Nurburgring racetrack in Germany, which hosts the German Formula One Grand Prix.

The European Commission said the extended probe would examine several additional financial measures provided in May to help avoid an immediate insolvency.

The Nurburgring, which is 90 percent owned by the state, ran into financial trouble amid a dispute with the track's operator over leasing fees, and the German state of Rhineland-Palatinate has sought to restructure the company with the help of a bridge financing package.

The measures included rescheduling interest payments on previously awarded loans and, possibly, an additional shareholder's loan to keep the circuit and its operator in business for six months during which a restructuring plan would be drawn up.

Rhineland-Palatinate is under pressure to make the track pay.

It has poured millions of euros into a racing-themed amusement park there.

The Nurburgring, about 120km northwest of Frankfurt, alternates the German Grand Prix with the Hockenheimring, host to the event in even-numbered years. It was the scene in 1976 of the fiery crash of then reigning Formula One World champion Niki Lauda, which almost killed the Austrian.

The track is used by automakers, including BMW and Toyota, to test cars.

The EU watchdog said: “At this stage, the Commission has doubts that the measures were granted on market terms and that the companies are viable without continued state support.

“It said the latest public support was linked to €524 million euros (R5.3 billion) of state aid granted by German authorities which it has been investigating since March to see if they had been given on market terms.

Public authorities may only provide financial support to troubled companies once in 10 years under EU state aid rules. - Reuters