Four activists from the Ukrainian protest group Femen have attacked the motorcade of the Tunisian prime minister during his visit to Brussels. The topless women jumped on the black BMW carrying PM Ali Larayedh as he left a press conference with European Commission President Jose Manuel Barroso. With Free Marguerite and Free Josephine slogans sprayed across their chests, they shouted \"Free Amina.\" Amina Sboui, a teenage Femen activist is being held in a Tunisian jail on charges on indecency after she posted topless pictures of herself online as part of a Femen campaign. The trial of Amina attracted widespread controversy, after three European activists, Pauline Hillier, Marguerite Stern and Josephine Markmann were sentenced to four months in prison following a topless protest for her release. The attack on the Tunisian PM’s motorcade came on the eve of Wednesday\'s appeal hearing of the the European activists. Tunisian President Moncef Marzouki faced a similar protest in April, at the Arab World Institute in Paris.   Marzouki was in the French capital in a private capacity to promote a book, when he was disrupted by topless women affiliated with Femen.