article_snippet: Police and fire fighters descended on the Palace of Westminster at about 9.15pm on Saturday after the alarm was raised .
article_snippet: Eyewitnesses described seeing emergency services on the roof of the Palace of Westminster Westminster on Saturday night after police were called .
article_snippet: Two fire engines from Soho and one fire and rescue unit from Chelsea attended the incident, according to London Fire Service.
article_snippet: A Scotland Yard spokeswoman confirmed Metropolitan Police officers and the London Fire Brigade were on the scene to deal with the incident .
article_snippet: On Saturday a spokesman for the House of Commons said: 'the incident is currently being investigated by police.