Sri Lanka today sacked 12 senior military officers alleging they are a threat to national security. Sources said President Mahinda Rajapaksa sent the officers on compulsory retirement for hatching a political conspiracy during the January 26 Presidential polls that saw incumbent Rajapaksa trouncing his former Army Chief General Sarath Fonseka.The officers included three major generals and two brigadiers and are accused of interfering in politics during the polls. The defence ministry in a statement confirmed that some senior officers were sent on compulsory retirement. Rajapakse is also understood to have transferred several senior military officers loyal to the former army general who he defeated in elections.