New York City ? The city broadened its search for human remains Friday at ground zero, expanding the effort to a service road and several nearby streets, buildings and rooftops that may have been missed in the cleanup after the Sept. 11, 2001, attacks.

City and state officials said debris from the World Trade Center could have been packed beneath a 60-foot-wide service road that was rebuilt in March 2002.

Workers have found more than 200 pieces of remains inside manholes along the road since utility workers discovered bones inside a manhole last week. Excavation continued Friday inside a dozen manholes and underground cavities.