Pandemonium erupted at Newark Airport on Monday night when an Alaska Airlines flight attendant thought two men looked suspicious and screamed, “Evacuate!” — sparking a mad dash for the exits, according to officials and social media posts.

The employee approached the two men at Gate 30 in Terminal A about 8:30 p.m. and asked them “a series of questions,” Port Authority rep Lenis Rodrigues told The Post in an emailed statement.

“She then became concerned after talking to the two men and hit an alarm and told people to evacuate the area. The alarm caused approximately 150-200 passengers to self-evacuate,” Rodrigues said.

The nature of the questions was not released.

Panicked passengers left their luggage and other belongings strewn at the gates as they ran for their lives — with some evacuating to the apron outside as heavily armed police stormed inside.

The two men were identified and questioned by Port Authority police. They were found to have done nothing wrong and were released, Rodrigues said.

Erin Fors was one of the passengers caught in the mass exodus.

“Imagine you’re starting to board and a frazzled flight attendant comes off the plane, stops the process, asks someone to call the police, then starts yelling (with increasing loudness) ‘evacuate!’” she said in a tweet.

“I ran with the crowds, hid under some seats, looked for an exit, headed out to the tarmac. Sounded like gun shots but after seeing the damage in this terminal, it’s more likely it was glass being shattered from people jumping. Terrifying,” she said.

Rodrigues said the incident remains under investigation.

“Passengers who evacuated were returned to the terminal and were rescreened before boarding flights. There was no impact to airport operations,” Rodrigues said, adding that the flight attendant was questioned.

It was unclear if she was allowed to board her flight to San Francisco for duty.

Alaska Airlines apologized for the incident.

“Alaska Airlines values the safety of our guests as our highest priority. We’re conducting a thorough investigation to determine what occurred,” a spokesperson said in a statement to The Post on Tuesday.

“In the meantime, the impacted Alaska guests were provided hotel accommodations for the night and rebooked on a flight departing Newark this morning.”