Sri Lankan President Chandrika Kumaratunga has threatened to cancel a landmark ceasefire agreement signed with Tamil Tiger rebels if she disagrees with some of its clauses, a local newspaper reported on Tuesday. Kumaratunga, who has sweeping powers to sack the government and suspend parliament, has already been highly critical of her archrival Prime Minister Ranil Wickremesinghe, saying he kept her in the dark about the Norwegian-brokered truce. "I can stop Ranil Wickremesinghe's agreement with one letter to the army commander," Kumaratunga was quoted by the Daily Mirror newspaper as saying about the agreement that was signed with the Liberation Tigers of Tamil Eelam (LTTE) on Friday. "There are several suspicious clauses in the agreement with the LTTE. I have appointed a committee to study the agreement and the report would be out in a day or two. Then I will take necessary action," she said. Kumaratunga's spokesman was out of Colombo on Tuesday and could not be contacted. A presidential aide confirmed Kumaratunga spoke at a local government election rally on Monday. The president has already issued a statement that criticised Wickremesinghe for not informing her that the agreement would be signed, something denied by government officials. The government has called for a parliamentary debate on the truce to start on Monday. Kumaratunga belongs to the main opposition party and has in the past lampooned Wickremesinghe for his peace plans but says she supports Norway's efforts to end a war that has killed more than 64,000 people. The presidential aide said a statement pointing out specific concerns would be released in a few days about the truce agreement that could pave the way for the first direct peace talks in seven years. Parliamentary elections in December that Wickremesinghe won were fought on competing peace strategies with Kumaratunga taking a much tougher stance than Wickremesinghe on the LTTE. The rebels are fighting for a separate Tamil state for minority Tamils in the country's north and east. Bureau Report