NEW YORK - (AP) - The New York Police Department is losing its topcounterterrorism official.

An NYPD spokesman confirmed Saturday that Richard Falkenrathplans to leave the nation's biggest police department at the end ofthe month.

The 41-year-old Falkenrath had been deputy commissioner ofcounterterrorism since 2006. He was an architect of thedepartment's efforts to detect and thwart terror threats. Heoversaw an initiative to fortify lower Manhattan with a network ofclosed-circuit security cameras, checkpoints and license platereaders.

Police Commissioner Raymond Kelly thanks him for his"outstanding service."

Before Falkenrath joined the NYPD he was a national securityaide for the administration of former President George W. Bush.

NYPD spokesman Paul Browne says there's no word on who willreplace Falkenrath or where he'll work after his departure.