Alabama’s major airports were not among American airports cyber-attacked early Monday morning by hackers from within the Russian Federation, the airports report.

The cyberattacks did not threaten safety or security systems such as air traffic control, internal airline communications or transportation security, reports said. Instead, the hacks were against public-facing websites that report airport wait times and congestion.

Airports in Birmingham, Huntsville and Mobile were reporting no website issues or delays related to the attack. Montgomery Regional Airport did not immediately respond.

Starting at 2 a.m. CT, the first reports came from LaGuardia Airport in New York City. Websites for the Des Moines International Airport, Los Angeles International Airport and Chicago O’Hare International Airport were also affected. Hartsfield-Jackson Atlanta International Airport was also targeted but had its systems up and running by 9:30 a.m. CT.

Reports said engineers and programmers were working to close the “backdoors” that allowed the breaches and strengthening systems in general.