Students protesting against rising university fees in the UK smashed windows at Millbank Tower, the home of the ruling Conservative Party, in central London on Wednesday, Sky News reported.

Protesters faced off with police outside Millbank Tower, hurling missiles at officers and lighting a fire at the base of the tower block HQ of the Conservative Party.

Several demonstrators smashed their way into the lobby of the building but were forced back by cops and security guards.

The protesters stormed the building with minimal opposition from the police, who responded quickly by sending in reinforcements. Police blamed the violence on a minority of “troublemakers," but had not made any arrests.

Several more attempts were made by the protesters to force their way into the building, which sits on the banks of the River Thames in the center of London, but police were able to resist the charges.

Eyewitnesses said protesters were throwing rocks, cooking pots and pans at police, were setting off fireworks and continued to fuel the fire with placards.

About 30,000 students from towns and cities across the UK traveled to central London for the rally, which was organized by the National Union of Students (NUS) and the University and College Union (UCU).

The protesters want to persuade the UK government to back down on plans to allow universities to charge tuition fees of up to £9,000 ($14,500) each year from 2012.

Students marched with teachers to show their anger at the planned price rise.

The plans dominated the Prime Minister's Questions in parliament Wednesday, where Deputy Prime Minister Nick Clegg came under fire for his party's policy reversal, having campaigned against a fees rise in the lead up to the UK election.

Clegg acknowledged that graduates who go on to high-earning careers will pay "over the odds" for their degrees as part of the shake-up of higher education funding.

But he insisted the UK government's plans were a "fair and progressive solution to a very difficult problem."

Labour's deputy leader Harriet Harman said Clegg had been "led astray" by the Conservative Party during negotiations to form a coalition government.

Speaking before the march NUS president Aaron Porter said the proposals are "utterly unacceptable" and an "outrage."

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