Terrorist Alert Issued: Faced with complaints that a second FBI terrorism alert was sowing confusion, Bush administration officials said yesterday they had decided to issue the warning only after concluding there was an imminent risk of more attacks connected to Osama bin Laden's al Qaeda network. The warning, issued late Monday, was based in part on information given to the United States by the Canadian intelligence service, U.S. and Canadian officials said yesterday. It was further spurred by fears that terrorists might carry out attacks in the run-up to Ramadan -- the holy month of fasting in Islam -- and by indications that bin Laden followers no longer needed approval from above to carry out operations, U.S. intelligence officials said.