Kurdish Leader Is Assassinated In Militant Raid
Islamic group Ansar al-Islam, which US calls link between Baghdad and Al Qaeda, assassinates Shawkat Hajji Mushir, speaker of Kurdish parliament, and two other government officials in attack in northern village of Qamesh Tapa; three civilians also die, 12 are wounded and two taken hostage; team of gunmen reportedly masqueraded as peace negotiators; attack is third assassination attempt by Islamists against Kurdish leaders in northern Iraq and comes as US moves to enlist Kurds in possible war against Pres Saddam Hussein; previous attempts recalled; Mushir was founding member of Patriotic Union of Kurdistan, party tht controls eastern Kurdish zone in Iraq; earned reputation for courage and battlefield savvy as commander in struggles against Hussein and rival Kurds; map; photos (M)