UPDATED: A group called Anonymous claim responsibility for cyber - WKOW 27: Madison, WI Breaking News, Weather and Sports

UPDATED: A group called Anonymous claim responsibility for cyber attack

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UPDATE (WKOW) -- The City of Madison is working with the FBI and the Department of Homeland Security Tuesday to determine who may have launched a cyber attack on their IT systems late Monday and to protect against further attacks, according to Chief Information Officer Paul Kronberger.

Madison Police Spokesperson Joel DeSpain tells 27 News the group "Anonymous" is claiming they are responsible for the cyber attack.

"Anonymous" posted a YouTube video Sunday that they want all audio recordings released in the recent shooting of Tony Robinson.

You can watch the YouTube video here.

But Kronberger said he does not know yet exactly who is responsible for the attack and may never know.

Kronberger says the attack was specifically a "denial-of-service" - which is used by hackers to interrupt services by flooding a computer network with information.

Some of the City's online payment services have been suspended as a result and there have been other internal issues according to Mayor Paul Soglin, who he doesn't believe it has impacted police and fire response time.

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MADISON (WKOW) -- Dispatchers with Dane County say their police, fire and medical communications are back to normal this morning.



Meanwhile, officers with the Madison Police Department say they are still reeling from the targeted threat.

Investigators say it's an ongoing battle with their online security. They believe the threat is likely the result of the recent officer-involved shooting on Williamson Street.

Madison Police Sergeant Galen Wiaring says these kinds of attacks can be pretty serious.

"Obviously any agency of our size relies on computers to dispatch calls to reports and email -that any other company deals with," Sergeant Wiaring said.

"So obviously it can impact us from a minor stance to greatly depending on the attack," he added.

This attack is slowing down mobile computer and internet response.

At this point, there is no word on how long the threat will linger.

"From other attacks where other agencies have faced this, it could be short term or it could be something that goes on for quite a while," Sergeant Wiaring said.

Sergeant Wiaring says Madison IT workers are aware of the complications and are dealing with repercussions of the cyber attack.

As of yet, the hackers have not identified themselves.

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MADISON (WKOW) -- The City of Madison's website was up and running around 10 p.m. Monday.

According to the Wisconsin State Journal, the Madison Police Department experienced intermittent problems for about an hour before service was restored.

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MADISON (WKOW) -- Emergency, government and other public communication systems appear to be targets of hackers trying to breach internet security.

Officials with Dane County Emergency Management announced Monday night that the City of Madison was experiencing a high volume of internet activity known to accompany cyber attacks.

Officials say this type of attack has been launched against other cities after officer-involved shootings like the one in Madison last Friday night.

The cyber security attacks are affecting internet based connections to city government, including access to mobile data public safety computers used by law enforcement, fire, and emergency medical agencies not only in the City of Madison, but agencies across all of Dane County.

Below is the complete statement released Monday night by the Dane County Department of Emergency Management:

The City of Madison was alerted Monday to a credible cyber security threat, potentially targeting city and other local government and public safety communication systems.

Late Monday, the City of Madison began experiencing a high volume of internet activity consistent with an outside cyber-attack. The City's website and email have been affected.

Similar internet based security attacks have occurred in other communities subsequent to tragic incidents like the one Friday night on Williamson Street in Madison.

The cyber security attacks are affecting internet based connections to city government, including access to mobile data public safety computers used by law enforcement, fire, and emergency medical agencies not only in the City of Madison, but agencies across all of Dane County.

It isn't known how long this activity could occur or who is responsible for it. Law enforcement officials believe the individuals responsible are attempting to breach local government and public safety communications information security systems.

Public safety officials in the field have been alerted to this potential cyber-attack and the impact it could have on systems they utilize.

Officials from Information Management and Emergency Management are carefully monitoring the situation. The Dane County Emergency Operations Center has been opened as a result of this cyber-attack.

Local utilities have also been notified as past cyber-attacks in other communities have also targeted utilities.

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