Two men have been arrested on suspicion of violent disorder during the student fees protest, Scotland Yard said.
The men, both aged 19, were arrested in Yorkshire, a Met spokesman said.
On Tuesday, officers investigating the Millbank riot released images of 13 protesters suspected of committing criminal offences.
The images were captured on CCTV cameras inside the office complex and on its roof as dozens of demonstrators stormed the building.
They were also filmed by officers stationed in the forecourt as more than a thousand people gathered outside the headquarters of the Tory party.
Police have now arrested 61 people in relation to the demonstration.
During the National Union of Students' march against proposed rises in student tuition fees windows were smashed, graffiti daubed on walls and missiles, including a fire extinguisher, were thrown from the seventh floor roof.
A four-hour stand-off ended when police brought in more than a hundred extra officers to clear the building and the road outside.
The Metropolitan Police have launched Operation Malone in a bid to trace those responsible for the violence and vandalism.
