Home Office officials are interviewing a suspected illegal immigrant found walking along the M27.
Police were called at 10.09am yesterday to reports of a man walking on the carriageway, near junction 9 at Whiteley.
He was arrested on suspicion of entering the country illegally. After he was detained, the Home Office took over the investigation.
A spokeswoman said: ‘One person was arrested on suspicion of entering the UK illegally. He claims to be a minor and is currently in custody awaiting age assessment by social services.
‘Where someone is found to have no right to remain in the UK, we will take action to remove them.’