The U.S. Federal Communications Commission voted along party lines on Thursday to repeal landmark 2015 rules that intended to ensure a free and open Internet, as protesters gather to oppose the change.

The 3-2 ruling sets up a court fight over a move that opponents fear will recast the digital landscape.

The meeting was evacuated before the vote for about 10 minutes on the basis of what Commission Chairman Ajit Pai called 'advice from security,' and resumed after sniffer dogs checked the building.

An FCC official told DailyMail.com that police had concerns after a bomb threat was phoned in.

Federal Communications Commission (FCC) Chairman Ajit Pai, left, greeted witnesses before Thursday's meeting to vote on net neutrality

Homeland Security police evacuated the hearing room briefly after a bomb threat was phoned in

After the bomb threat was called in, officers evacuated the FCC's headquarters and called in the dogs

Bomb-sniffing dogs were brought in to sweep the building and clear it before the hearing could resume

Diane Tepfer hed a sign with an image of Pai as the 'Grinch who Stole the Internet' during a Washington, D.C. protest outside FCC headquarters

Pai's victory is also a win for internet service providers like AT&T Inc., Comcast Corp. and Verizon Communications Inc. that opposed the regulations, popularly known as net neutrality rules, and hands them power over what web content consumers can access.

Democrats, Hollywood and companies like Google parent Alphabet Inc. and Facebook Inc. had urged Pai, a Republican appointed by President Donald Trump, not to rescind the Obama-era rules barring service providers from blocking, slowing access to or charging more for certain content.

Consumer advocates and trade groups representing content providers have planned a legal challenge aimed at preserving those rules.

White House press secretary Sarah Sanders told reporters on Thursday that 'the administration supports the FCC's efforts. And at the same time the White House certainly has and always will support a fair and free Internet.'

Someone called in a bomb threat during the FCC vote. Eventually the�� emoji will be similar to the �� emoji #NetNeutrality pic.twitter.com/IEOqcI7V3O — Adam Felibrico (@AdamFelibrico) December 14, 2017

The 3-2 vote to rescind net neutrality rules could usher in big changes in how Americans use the Internet, according to consumer advocates

FCC Commissioner Mignon Clyburn, a Democrat and daughter of South Carolina Rep. James Clyburn, said in the runup to the vote that Republicans were 'handing the keys to the Internet' to a 'handful of multi-billion dollar corporations.'

Clyburn addressed protesters outside, raising a clenched fist, before the hearing began.

Pai has argued that the 2015 rules were heavy handed and stifled competition and innovation among service providers.

'The Internet wasn't broken in 2015. We weren't living in a digital dystopia. To the contrary, the internet is perhaps the one thing in American society we can all agree has been a stunning success,' he said on Thursday.

But companies like Netflix, worried about speed-throttling and other barriers to video streaming, lashed out quickly.

'We're disappointed in the decision to gut #NetNeutrality protections that ushered in an unprecedented era of innovation, creativity & civic engagement. This is the beginning of a longer legal battle. Netflix stands w/ innovators, large & small, to oppose this misguided FCC order,' the company tweeted.

Netflix was not amused on Thursday, tweeting its disappointment at the FCC's move

FCC Commissioner Mignon Clyburn, a Democrat and daughter of South Carolina Rep. James Clyburn, rallied with protesters outside the hearing room

Net neutrality rules prevented internet service providers from creating different levels of service and blocking or promoting individual companies and organizations on their systems

Consumers are unlikely to see any immediate changes resulting from the rule change, but smaller startups worry the lack of restrictions could drive up costs or lead to their content being blocked.

Internet service providers say they will not block or throttle legal content but that they may engage in paid prioritization. They say consumers will see no change and argue that the largely unregulated internet worked fine in the two decades before the order was adopted.

Democrats point to polls showing the proposal is deeply unpopular and say they will ultimately prevail in protecting the rules, either in the courts or in U.S. Congress.

FCC Commissioner Jessica Rosenworcel, a Democrat, said in a written dissent released on Thursday that the decision grants internet providers 'extraordinary new power' from the FCC.

'They have the technical ability and business incentive to discriminate and manipulate your internet traffic. And now this agency gives them the legal green light to go ahead,' she said.

WHAT IS 'NET NEUTRALITY'? Net neutrality is the principle that internet providers treat all web traffic equally, and it's pretty much how the internet has worked since its creation. But regulators, consumer advocates and internet companies were concerned about what broadband companies could do with their power as the pathway to the internet - blocking or slowing down apps that rival their own services, for example. WHAT DID THE GOVERNMENT DO ABOUT IT? The FCC in 2015 approved rules, on a party-line vote, that made sure cable and phone companies don't manipulate traffic. With them in place, a provider such as Comcast can't charge Netflix for a faster path to its customers, or block it or slow it down. The net neutrality rules gave the FCC power to go after companies for business practices that weren't explicitly banned as well. For example, the Obama FCC said that 'zero rating' practices by AT&T violated net neutrality. The telecom giant exempted its own video app from cellphone data caps, which would save some consumers money, and said video rivals could pay for the same treatment. Pai's FCC spiked the effort to go after AT&T, even before it began rolling out a plan to undo the net neutrality rules entirely. A federal appeals court upheld the rules in 2016 after broadband providers sued. WHAT DO TELECOM COMPANIES WANT? Big telecom companies hate the stricter regulation that comes with the net neutrality rules and have fought them fiercely in court. They say the regulations can undermine investment in broadband and introduced uncertainty about what were acceptable business practices. There were concerns about potential price regulation, even though the FCC had said it won't set prices for consumer internet service. WHAT DOES SILICON VALLEY WANT? Internet companies such as Google have strongly backed net neutrality, but many tech firms have been more muted in their activism this year. Netflix, which had been vocal in support of the rules in 2015, said in January that weaker net neutrality wouldn't hurt it because it's now too popular with users for broadband providers to interfere. Advertisement

Several state attorneys general have said they will work to oppose the ruling, citing problems with comments made to the FCC during the public comment period. Other critics have said they will consider challenging what they consider to be weaker enforcement.

Net neutrality supporters rallied in front of the FCC building in Washington before the vote, and some Congress members were expected to join.

Amid chants of 'Hey hey, ho ho, Chairman Pai has got to go!', several dozen people stood in the cold to hear activists speak out against the change.

Online protesters included celebrities like 'Star Wars' actor Mark Hamill.

The 2015 rules were intended to give consumers equal access to web content and prevent broadband providers from favoring their own content. Pai proposes allowing those practices as long as they are disclosed.

Michael Powell, a former FCC chairman who heads a trade group representing major cable companies and broadcasters, told reporters earlier this week that internet providers would not block content because it would not make economic sense.

A University of Maryland poll released this week found that more than 80 percent of respondents opposed the proposal to rescind the rules

Democrats say they will ultimately prevail in protecting the rules, either in the courts or in U.S. Congress.

'They make a lot of money on an open internet,' Powell said, adding it is 'much more profitable' than a closed system. 'This is not a pledge of good-heartedness, it's a pledge in the shareholders' interest.'

A University of Maryland poll released this week found that more than 80 percent of respondents opposed the proposal. The survey of 1,077 registered voters was conducted online by the Program for Public Consultation at the University of Maryland from Dec. 6-8.

Democrats have said the absence of rules would be unacceptable and that they would work to overturn the proposal if it is approved. Advocates of the net neutrality rules plan a legal challenge.

Pai's proposal is 'like letting the bullies develop their own playground rules,' said Democratic Senator Ed Markey.

Many Republicans back Pai's proposal but want Congress to write net neutrality rules. Senate Majority Leader Mitch McConnell said the FCC would 'return the internet to a consumer-driven marketplace free of innovation-stifling regulations.'

A group of nearly 20 state attorneys general asked the FCC to delay the vote until the issue of fake comments is addressed.