The DHS also offered assistance to "certain foreign airports" related to security enhancement, according to the statement.
Johnson noted that the United States is stepping up security, despite the fact that the circumstances surrounding the October 31 Russian Metrojet crash are still under investigation.
“These enhancements are designed to provide an additional layer of security for the traveling public, and will be undertaken in consultation with relevant foreign governments and relevant passenger and cargo airlines,” Johnson explained.
On Saturday, an Airbus A321 crashed in Egypt’s Sinai Peninsula killing all 224 people on board in what has become the largest civil aviation disaster in Russian and Soviet history.
An Egypt-led investigation is working to determine the cause of the crash with the help from Russian and other foreign experts. UK investigators reportedly suggested earlier on Friday that the airliner was struck down by a bomb planted in its hold before take-off. Moscow said it was too early to draw conclusions.