BAGHDAD, Iraq, Jan. 30 — The Iraqi authorities, with the help of American intelligence agencies, are creating an intelligence service here that will focus on rooting out guerrilla fighters, especially those from outside the country, Iraqi and American officials said Friday. The service will employ some former agents of Saddam Hussein's security apparatus and will probably receive financing from the American government, the officials said. Many of the agents will work in the border towns of Iraq to identify foreign fighters who have slipped into the country and will monitor their activities, said Ibrahim al-Janabi, a senior member of the...