Allegations that officials, including a senior member of Singh's Congress party, took bribes to swing deals for the $6 billion (3 billion pounds) sporting extravaganza held last October in New Delhi is one of several corruption scandals to have hit the government.
"Even before the Games had concluded there were complaints of wrongdoing," Singh told parliament. "If there are any instances of wrong things being done, we will investigate that matter and if found guilty, nobody will be spared."
The Central Bureau of Investigation (CBI), India's equivalent of the FBI, on Wednesday arrested Lalit Bhanot, the organising committee's secretary general and V.K. Verma, the director general of the committee.
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Both were close aides of Suresh Kalmadi, the sacked Games chief who is a Congress lawmaker, and the arrests are a fresh embarrassment for the party which is under fire for not doing enough to stamp out corruption.
India is co-hosting the Feb 19-April 2 Cricket World Cup with subcontinental neighbours Bangladesh and Sri Lanka.
(Reporting by Rajesh Kumar Singh and C.J. Kuncheria)
(Editing by Jon Bramley)
