An Israeli court on Wednesday ordered a British journalist with links to a pro-Palestinian group to leave the country, citing security concerns. Ewa Jasiewicz was refused entry into Israel on Aug. 11 and has been detained since then at Israel's Ben Gurion International Airport. Her lawyer pledged to appeal Wednesday's expulsion order to the Supreme Court. Israeli authorities charged that Jasiewicz is an activist with the International Solidarity Movement, a Palestinian-led group that leads protests in the West Bank and Gaza. The 26-year-old freelance journalist writes for a leftist monthly and has worked with the group in the past. In her expulsion order Wednesday, Tel Aviv District Court judge Drora Pilpel said that although Jasiewicz doesn't pose a direct threat to Israeli security, Palestinians could manipulate her "naiveté."