The documents have been registered and digitized and are now on their way to the US equivalent of the National Archives, National Archives. The police authority says nothing about what they contain, only that they were previously not considered to have a connection to the murder investigation, reports, among others, CBS News.
The announcement follows President Donald Trump's presidential decree to make public all information related to the murders of Democrat John F Kennedy, Senator and presidential candidate Robert F Kennedy, and civil rights activist Martin Luther King.
The fatal shots against John F Kennedy were fired when he was riding in an open car procession in Dallas, Texas. They shook the US and the world.
In 1992, Congress decided that all material related to the murder would be stored together at National Archives and made public, with some exceptions. Federal authorities were given 25 years to review the documents, totaling around 5 million.
In principle, all material is now available to the public, but last autumn, around 3,000 documents still had their secrecy stamp, writes AP.