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People In Dallas Freaked Out When A Hacker Set Off Every Single Emergency Siren

"People were concerned we were being attacked with what was going on overseas,” a city spokesperson said.

Posted on April 8, 2017, at 4:34 p.m. ET

A hacker activated the emergency siren alert system in Dallas late Friday night, setting off every one of the city's 156 sirens installed to warn citizens of imminent danger.

Leif Skoogfors/FEMA / Via{"keywords":"31188"}

A storm warning siren in Kansas.

The sirens blared from 11:42 p.m. local time until 1:17 a.m. when officials manually shut down the system.

Rocky Vaz, director of Dallas’ Office of Emergency Management, said officials were working to find the person responsible, but warned that it “is like finding a needle in the haystack."

"It is going to be a pretty long process," Vaz said.

“If we had not disconnected the system, it would have gone on for much longer,” Vaz said.

Vaz told reporters that officials had been able to determine the hack was done by someone outside of their system but in the Dallas area.

He said the main concern at this point was to get system back up and running as it had been “unplugged.”

Dallas City Hall / Via

Dallas spokesperson Sana Syed told media the city’s 911 call center was overwhelmed with calls from frantic individuals while the sirens blared.

She said some 4,400 calls came in to 911 from 11:30 p.m. to 3:33 a.m. local time. Eight hundred calls alone came in around midnight, leading to a six-minute response time.

So I can put my guns back in their hiding places because we aren't being invaded?

What's your best guess for the Dallas Apocalypse? #dallassirens

Isn't this how a horror film starts? #DallasSirens

As the city continued to test the system on Saturday, Syed asked citizens not to continue to call 911.

“We understand that people were concerned we were being attacked with what was going on overseas,” she said, referring to the recent US bombing in Syria. “We are very aware of the situation. It just backs up our lines.”

Vaz said the city is currently working with the FEC to find the individual responsible.

A BuzzFeed News investigation, in partnership with the International Consortium of Investigative Journalists, based on thousands of documents the government didn't want you to see.