The U.S. Defense Department has stopped issuing weapons to thousands of law enforcement agencies until it is satisfied that state officials can account for all the surplus guns, aircraft, Humvees and armored personnel carriers it has given police under a $2.6 billion program, The Associated Press has learned.

The program provides police departments and other law enforcement agencies with military equipment ranging from guns and helicopters to computers and air conditioners and even toilet paper. The equipment is cheap or free for law enforcement agencies, but much of it comes with strict rules that prohibit it from being sold and dictate how it must be tracked.

The military decided to conduct a ``one-time, clean sweep'' of all state inventories instead of reviewing them piecemeal, said Kenneth MacNevin, a spokesman for the federal Defense Logistics Agency.

While some gear, including guns, has been stolen or gone missing over the years, MacNevin said the reporting requirements themselves aren't new and that the review wasn't prompted by anything specific.

The department ordered state-appointed coordinators in 49 states to certify the whereabouts of that equipment that has already been distributed through the long-running arrangement overseen by the agency's Law Enforcement Support Office.

MacNevin acknowledged a pair of news media reports and a weeks-long series of AP requests for records were factors in the decision to send letters to the states late last month ordering them to comply with program rules or face suspension from it.

The Arizona Republic reported last month that the Pinal County Sheriff's Office has stockpiled millions of dollars' worth of equipment through the program, distributing some of the gear to non-police agencies, and intended to sell other property, which would violate the program's rules.

A report in March by California Watch, which was founded by the Center for Investigative Reporting, found that California police accumulated more equipment during 2011 than any other year in the program's two-decade history. That follows the overall trend in the program, which last year doled out almost $500 million in gear, up by more than double from the year before.

The surplus program has grown exponentially in recent years, with a record $498 million worth of property distributed in fiscal year 2011. That includes $191 million in aircraft alone and more than 15,000 weapons worth nearly $4.8 million. Military officials said the program has become more popular as law enforcement agencies sustain deep budget cuts.

The sudden cutoff in the supply of free weapons is an ``inconvenience,'' but not a big problem, said Jeff Shadburn, Ohio's program coordinator. Shadburn said he already had collected the information as previously required, but now he simply has to certify the information under the penalty of perjury.

(AP)