CAIRO — A bomb exploded on Sunday outside a branch of the French supermarket chain Carrefour in Egypt's Mediterranean city of Alexandria, killing one person and wounding six, security officials said. They said the blast took place in Alexandria's eastern district of Seyouf. The officials spoke on condition of anonymity because they were not authorized to speak to journalists. The blasts are the latest in a bombing campaign blamed on militants who are targeting foreign and local economic and financial establishments. They seem designed to undermine confidence in Egypt ahead of a major, three-day economic conference scheduled to open Friday in the Red Sea resort of Sharm El-Sheikh. Egypt plans to announce projects worth up to $35 billion during that conference. On Saturday, a bomb exploded in front of the branch of a major Emirati bank in a Nile Delta town north of the capital, Cairo. The blast killed a policeman and a civilian and wounded 16 others. The attacks, mostly centered in Cairo, have targeted offices of foreign mobile phone companies as well as branches of an American fast food chain. They have also targeted shopping malls, busy streets and courthouses, disrupting life and creating the image of a country mired in unrest. Egypt has been grappling with a burgeoning insurgency in the strategic Sinai Peninsula for years. On Thursday, the president replaced the Cabinet minister in charge of police. The minister, Mohammed Ibrahim, was replaced by Magdy Abdel-Ghaffar, another top police general with many years of service in the nation's feared State Security Agency. — Agencies