Updated

More than two dozen U.S. senators are calling on the nation's top intelligence official to make information public about the scope and duration of the National Security Agency's surveillance program.

In a letter sent Friday to Director of National Intelligence James Clapper, the bipartisan group of lawmakers also want him provide examples of how the bulk collection of phone records provided unique intelligence.

The letter from the 26 senators, organized by Democrat Ron Wyden of Oregon, says they are concerned the gathering of massive of amounts of data on the communications of ordinary Americans depended on secret interpretations of the Patriot Act.

The letter says those interpretations, along with misleading statements from U.S. intelligence officials, prevented American citizens from being able to evaluate the decisions their government was making.