Artillery units killed most of a 21-member Kurdish rebel group in northern Iraq as the group moved toward the Turkish border, the military said Tuesday. The military's Web site said the shelling had rendered the group, which was trying to sneak into Turkey, "ineffective" - a term used by the military to refer to killed rebels. The rebels were targeted some three kilometers (two miles) from the shared border in Iraq's Zap region late Monday, the statement said. The military has launched several aerial cross-border attacks on suspected rebel positions in northern Iraq this year. It also staged a major ground operation against rebel bases there in February.