Cairo : Motorcycle-borne masked gunmen opened fire on a tourist bus of Arab-Israeli citizens and a hotel close to the Giza pyramids in Egypt during a rally of Muslim Brotherhood supporters today, but the tourists escaped unhurt. The attackers, apparantely part of a group of around 15 Brotherhood supporters, used birdshot and targeted the tourists while they entered the hotel on Al-Haram Street, the official said.No casualties have been reported, however. But the attack caused some damages to the bus and the hotel gate and facade.A suspect was arrested and police were searching for the rest of the group, the Interior Ministry said in a statement. The passengers on the bus were Arab-Israeli citizens, Al-ahram reported, citing a statement by Israeli government.