THREE people have been arrested by armed police – but Scotland Yard has refused to comment.
Hampshire officers were in Kingston Road, Buckland, near Crown Bingo last night.
A cordon was put up further down the road near Ocean Fresh chip shop.
Witnesses described police detaining two men and a woman.
The police helicopter was flying low overhead the incident at around 9pm.
Hampshire police said the trio were arrested in connection with Metropolitan police investigation.
It really shocked me, I was wondering what was going onOnlooker
Now a spokesman for Scotland Yard said the investigation was not terror-related but was a ‘sensitive investigation’.
He said: ‘It’s a matter of we’re not prepared to discuss.’
One witness, who asked not to be named, said: ‘The helicopter was flying above.
‘All my neighbours came out.
‘I went down to the main road, there were police officers with guns.
‘They ran into Crown Bingo and they had sniffer dogs.’
He added: ‘It really shocked me, I was wondering what was going on.’
Police and forensics officers were at the scene for around two hours, he added.
A Hampshire police spokeswoman said: ‘Two men and a woman were arrested by Hampshire police officers whilst in a capacity in assisting the Metropolitan Police Service and their ongoing investigation.’
No details have yet been released over the nature of the probe.
The News understands the investigation does not relate to crime committed in Portsmouth.
People have reacted to the police’s decision not to release information.
Posting on The News Facebook page, Kat Davies said: ‘I know the police have a job to do, however I do think some information should be released.
‘I was in the bingo hall when four armed police and dogs came running through.
‘Un today’s world where lots goes on, who knew what was going on.
‘Also my house is right by this road. How do they think it made us feel?
‘I was quite shaken.’