The Left parties today stepped up pressure demanding the resignation of Shashi Tharoor, Minister of state for external affairs. <br/><br/>CPI(M) in a statement in New Delhi said it was highly inappropriate for a union minister to be involved in murky dealings in connection with IPL cricket event. <br/><br/>Noting that the IPL is not just a sporting event but a big business enterprise in which big money is involved, the CPI(M) said it was highly inappropriate for a minister in the Union government to be involved in such murky dealings. <br/><br/>CPI also demanded Tharoor's designation saying his continuance in the government has become untenable.<br/>