House of Lords to investigate Parliament roof protest

The House of Lords will investigate how three protesters were able to get around parliamentary security to protest during the visit of Canadian Prime Minister Stephen Harper, a spokesman said.

Three protesters were detained at 12 noon today by parliamentary security staff while trying to access non-public rooms in Parliament.

They attempted to protest during the prime minister of Canada's visit to Parliament.

The business of Parliament was unaffected. A full investigation is under way.

– House of Lords' spokesman.