Washington ( CNN ) -- Department of Homeland Security Secretary Jeh Johnson is ordering more security for more than 9,500 federal government buildings and their 1.4 million daily visitors . Johnson said in a statement Tuesday that the Federal Protective Service 's new security measures are a precautionary guard against `` continued public calls by terrorist organizations for attacks on the homeland and elsewhere '' after two attacks last week on Canada 's government . But Johnson did n't reveal the details of the new security measures , saying they 'll vary by location . `` The precise actions we are taking and the precise locations at which we will enhance security is law-enforcement sensitive , will vary and shift from location to location , and will be continually re-evaluated , '' Johnson said in the statement . A Homeland Security official told CNN there is `` no new intelligence '' suggesting that U.S. government buildings face additional threats , and emphasized that the changes are a `` precautionary measure '' that only apply to buildings secured by the Federal Protective Service . CNN 's Evan Perez contributed to this report .
The United States is tightening security measures at federal buildings . The move came after attacks on Iran 's government last week . Homeland Security Secretary Jeh Johnson called the enhanced security precautionary .