Police are investigating reports of a break-in at a Parliament office of Britain's main opposition leader, Scotland Yard and news reports said Saturday.
The Press Association reports the incident took place at offices used by Labour leader Ed Miliband, though not his personal office.
According to the news agency, a staff member had found a door forced open, but it was unclear if anything was stolen.
The Metropolitan Police said officers were called just before 7 p.m. (3 p.m. EDT) Friday to respond to reports of "alleged forced entry to an office in the Palace of Westminster."
Labour, Britain's main opposition party, said it could not comment on a police investigation.
The alleged break-in took place in the Norman Shaw Buildings, just east of the famous neo-Gothic main Parliament building in central London.