The Indianapolis Motor Speedway organisation has announced that a number of people are to leave their roles in an effort to reduce costs in the economic downturn.

Following on from the release of director of public relations for Indianapolis Ron Green, the company confirmed that another ten people were to leave their roles late last week - increasing the number to have lost their jobs to 25 inside a week.

The cuts, shared between the Indy Racing League and IMS Productions, have been linked directly to the 'tough global ecomony' with many of the jobs going being those that involved work behind the scenes.

"All of our business units have been impacted by the tough global economy," Fred Nation, executive vice president of communications, said. "We will continue to address these challenges by improving the operational performance of our companies."

As well as the economic downturn, Indianapolis has been hit by lower than expected revenue from NASCAR's Brickyard 400 and MotoGP's second visit to the venue.