Terrorism in Egypt in the 20th and 21st centuries has targeted the Egyptian government officials, Egyptian police and Egyptian army members, tourists, Sufi Mosques and the Christian minority. Many attacks have been linked to Islamic extremism, and terrorism increased in the 1990s when the Islamist movement al-Gama'a al-Islamiyya targeted high-level political leaders and killed hundreds - including civilians - in its pursuit of implementing traditional Sharia law in Egypt.