The letter, addressed to Sri Lanka's president, Mahinda Rajapakse, and signed by foreign ministers David Miliband and Bernard Kouchner, warned that "there have been a number of reports that your security forces have not lived up to these commitments." It added: "We urge you again to stop the use of such weapons, to accept a humanitarian truce in order to find a way to get humanitarian assistance to the many civilians still in the conflict zone."