The Income Tax department is scrutinising documents of individual bids and the rates submitted by contractors to the Common Wealth Games Organising Committee. Official sources said, this may lead to filing of cases of tax evasion, if the contractors were found to have wrongly invoiced their works. Sources said that the department, after two rounds of searches on major consortiums and contractors collected incriminating documents including those on contracts for the works. The needle of the suspicion is on bids by these contractors to the Games Organising Committee.The competence of these bids will establish the fact that if these contracts were worthy enough to be awarded by the Committee and other agencies to the consortiums and contractors.Official sources also said that the probe is specifically looking into the contracts awarded by the Games Organising Committee and the role of its officials and contractors including the charges of bribing. Income Tax department carried out simultaneous nationwide raids on 50 premises of four contractors yesterday. They had executed some Games related works on landscaping and beautification works of the Games venues.Earlier, it carried out similar searches at 19 other premises. The department will share the seized documents with Enforcement Directorate and other agencies to streamline the probe. Official sources said, various agencies have approached the IT department for information and sharing of files.In a related development, CBI has started probe against alleged irregularities in the distribution of Common Wealth Games complimentary tickets of twenty thousand rupees each for the closing ceremony. Meanwhile, Delhi Chief Minister Shiela Dikshit says that her government is ready for any probe in Common Wealth Games spending.