Tunisian Foreign Minister Kamal Morjane left Sharm el-Sheikh on Wednesday, hours before the start of the Arab Economic Summit.
Morjane flew from Sharm el-Sheikh to Cairo early in the morning. Airport staff were surprised to discover him among the travellers on a Tunisia-bound flight. He was seen off by an official from his country's embassy in Cairo.
Morjane finished his travel procedures away from the VIP lounge. He declined to comment on why he was leaving prior to representing Tunisia at the summit.
Last week, Tunisia's President Zine al-Abidine Ben Ali fled the country after a month of popular protests against the government.
Violence and riots continue as the country struggles to maintain peace.