Myanmar's military junta said Thursday it was releasing and expelling four foreign prisoners as part of a broad amnesty that also includes dozens of political prisoners.The four are Victoria Bowman, a former British ambassador to Myanmar; Sean Turnell, an Australian academic; Toru Kubota, a Japanese documentary filmmaker; and U Kyaw Htay Oo, a Burmese with United States citizenship who had been working as a gardener at the home of the country's imprisoned civilian leader, Daw Aung San Suu Kyi.