CAIRO (AP) — Gunmen on a speeding motorcycle opened fire outside the famed Giza Pyramids on the outskirts of Cairo early Wednesday, killing two police officers in a rare attack near one of the country's top tourist attractions, authorities said. The attack comes as Egypt tries to rehabilitate its vital tourism industry, which accounted for as much as 20 percent of foreign currency revenues before its 2011 revolt that toppled autocrat Hosni Mubarak and later years of turmoil. The gunmen opened fire on a police vehicle at the back of the Giza Pyramids plateau on a main highway that leads to southern Egypt, wounding the two tourism police officers, a security official said. Sinai-based Ansar Beit al-Maqdis — which has claimed most of the major attacks in Egypt — has pledged allegiance to the Islamic State extremist group fighting in Iraq and Syria and has declared itself to be the group's Sinai Province.