London (CNN) Police officers Tasered and arrested a man inside the entrance to the grounds of the UK's Houses of Parliament in Westminster on Tuesday.

London's Metropolitan Police confirmed in a statement that the man was "detained and arrested by Carriage Gates inside the Palace of Westminster on suspicion of trespassing at a protected site."

The statement added that the incident happened around 11:55 a.m. in the British capital.

According to the UK Press Association, around a dozen officers "swarmed" around the man, who was then held against a fence.

Met Police confirmed that the man was "detained and arrested."

"A Taser was deployed," the police statement said, adding that "enquiries into the circumstances continue."

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