Officers from the South East Regional Organised Crime Unit – Sercou – raided a property in Elm Grove, Southsea, yesterday.
A Serocu spokesman said detectives ‘ undertook a search warrant in the city, supported by firearms officers’.
He added: ‘The men, aged 38, 44 and 46 years old were arrested on suspicion of firearm offences in Elm Grove, Southsea and remain in police custody.’
