Cyber attacks reported at US airports

Some of the nation's largest airports have been targeted for cyberattacks

Monday by an attacker within the Russian Federation, a senior official briefed confirmed to ABC News.

the systems targeted do not handle air traffic control, internal airline communications and coordination, or transportation security.

The attacks have resulted in targeted "denial of public access" to public-facing web domains that report airport wait times and congestion.

Over a dozen airport websites were impacted by the "denial of service" attack, John Hultquist, head of intelligence analysis at cybersecurity firm Mandiant,

That type of attack essentially overloads sites by jamming them with artificial users.

The attacks were first reported around 3 a.m. ET when the Port Authority notified the Cybersecurity and Infrastructure Security Agency

LaGuardia has been restored, but other airports around the country have subsequently been targeted.