Armed police arrested a man at the Houses of Parliament who was trying to sneak in a mystery liquid that may have been acid.
There was a considerable security scare on Friday as armed police seized a man on a tour group who had tried to smuggle a small amount of liquid in a 'miniature bottle' with him.
He was arrested in Parliament's Westminster Hall on suspicion of 'possession of an article for use in criminal damage'.
There was a considerable security scare on Friday as armed police arrested a man who had tried to smuggle a small amount of mystery liquid with him (File image)
The liquid was in a miniature bottle and may have been 'acid or an accelerant', a source told The Sun (File image)
The man was held at a police station in central London on Saturday night while the mystery substance was tested.
Checks were also carried out on the man's background.
The Metropolitan Police said: 'He was found to be in possession of a miniature alcohol bottle which was confiscated from him at the search point.
The man was searched at a checkpoint and then taken