The New York Police Department removed a senior official from one of its two sometimes competing antiterrorism units, after it played a role in disrupting a sensitive federal terrorism investigation, the New York Times reports. He was replaced by a top official from the other unit. The investigation was disrupted two weeks ago when detectives from the Intelligence Division sought assistance from an imam who then alerted the central suspect in the case to the inquiry.Federal agents and police detectives have been hunting for operatives in a suspected Qaeda bomb plot. The decision to show photos of the main suspect and other men to the imam, who had provided information to police in the past, forced authorities to conduct raids and arrest the suspect sooner than they might have otherwise. The development could make it harder to identify and develop evidence against others involved in what prosecutors said was a plot to detonate bombs in the U.S.