Sri Lanka's president has called for mass protests against a UN report which urged a probe into alleged war crimes committed during the fight against Tamil Tiger rebels. President Mahinda Rajapakse in an address to his Sri Lanka Freedom Party officials said this year's May Day rally should be turned into a show of strength against international calls for war crimes investigations. Mr. Rajapakse said all these days they did not demonstrate their strength and now the time has come to do so. An audio tape of the speech was released by his office. His remarks came as a leaked UN report called for an independent inquiry into credible allegations that Sri Lanka committed war crimes and crimes against humanity in its final 2009 offensive against Tamil Tiger rebels. Rajapakse said a section of the international community was leading a campaign against Sri Lanka and harbouring a grudge because he did not allow the country to be divided as demanded by the Tamil Tigers.