London police have arrested 149 persons after unrest disorder broke out during a mass protest against government cuts in London when more than 250.000 mostly peaceful protesters marched through the center of the British capital.

The Metropolitan Police said Monday that 138 people had been charged with aggravated trespass in connection with a sit-in at the luxury Fortnum and Mason department store. All were released on bail, the AP reported.

Commander Bob Broadhurst of Scotland Yard, who led the police operation, blasted a "group of criminals" who "decided to attack buildings in central London and attack police officers."

31 police officers and 28 members of the public were injured in the violence, police said seven of which was kept in the hospital.

Britain is facing 80 billion pounds (USD130 billion) of public spending cuts from Prime Minister David Cameron's coalition government as it struggles to slash the country's deficit.

The TUC, the main umbrella body for British unions, says it believes the cuts will threaten the country's economic recovery.

The government has already raised sales tax, and the TUC has urged the government to create new taxes for banks and to close loopholes that allow some companies to pay less tax.