Adding to the litany of complaints about one of the nation's primary counter-terrorism safety nets, a Justice Department audit has concluded that the FBI provided the government-wide terrorism watch list with incomplete, inaccurate and outdated information about suspects for almost three years. 

As a result, many innocent people stayed on the terrorism watch list long after they were cleared of any wrongdoing, and real threats to national security were sometimes left off the list or not added in a timely manner, according to the audit, released Monday by Justice Department Inspector General Glenn A. Fine. 

The watch list was established by presidential directive in September 2003 so that law enforcement and intelligence officials could have a uniform database of terrorism suspects, enabling agencies to screen out those trying to get into the country and flag others domestically. 

It is managed by the Terrorist Screening Center, which is overseen by the Justice Department and staffed through the Justice, Homeland Security and State departments and other agencies. 

The audit also found problems in the way other law enforcement agencies within the Justice Department contributed to the watch list - primarily they did not ensure that individuals were removed once cleared of suspicion or wrongdoing. Those agencies include the Drug Enforcement Administration, the U.S. Marshals Service, the Bureau of Prisons and the Bureau of Alcohol, Tobacco, Firearms and Explosives. 

FBI Provided Flawed Data For Terrorism Watch List, Audit Says