MADRID - A Spanish judge issued an international arrest warrant yesterday for the former Argentine military president, Mr Leopoldo Galtieri, for his alleged role in the killing of three Spaniards during Argentina's "dirty war". Judge Baltasar Garzon, of the National High Court, who is investigating the disappearance of about 300 Spanish nationals in Argentina from 1976-1983 said he was asking Interpol to take Mr Galtieri into custody if he leaves his homeland.