Muslims who change their names to sound more traditionally American, as immigrants have done for generations, or who adopt Arabic names as a sign of their faith are often investigated and catalogued in secret New York Police Department intelligence files, according to documents obtained by The Associated Press.

The NYPD monitors everyone in the city who changes his or her name, according to internal police documents and interviews. For those whose names sound Arabic or might be from Muslim countries, police run comprehensive background checks that include reviewing travel records, criminal histories, business licenses and immigration documents. All this is recorded in police databases for supervisors, who review the names and select a handful of people for police to visit.