TORONTO - The appointments of four members of the Niagara Parks Commission board have been revoked as a probe of the agency's expenses continues.

An interim board, comprised of chairwoman Fay Booker, vice chairwoman Janice Thomson, four municipal appointees, and six senior Ontario public servants will operate until a new permanent board is appointed.

The Ministry of Tourism and Culture says it is conducting audits of the commission's travel, meal and hospitality expenses as well as procurement practices.

Minister Michael Chan says the government is taking action to ensure that the commission operates in an accountable and transparent manner.

Earlier this month, Chan announced he was looking into how a Niagara Parks Commission executive was able to rack up nearly $400,000 on his corporate credit card over three years.

The expenses of the recently departed executive included a $10,000 hotel bill in England and a $1,800 nightclub tab.