BAGHDAD (AP) — Eight members of one Shiite family were killed south of Baghdad on Monday in the worst incident of a bloody day across Iraq that left at least 23 dead. The spate of attacks — and the fact that some of the family were beheaded — raised fears that insurgents are trying to re-ignite sectarian warfare at a time when the country is preparing for critical March elections.The March 7 election will determine who will oversee the country as the U.S. forces go home.