Two men have been arrested on suspicion of drug trafficking after a boat was seized in the English Channel.
The National Crime Agency (NCA) said the boat was intercepted off the coast of south-west Cornwall and escorted to Newlyn.
Newlyn harbour has since re-opened after being closed while the bomb squad investigated.
An NCA spokesman said: "As part of a National Crime Agency-led operation, the Border Force cutter HMC Vigilant intercepted a sailing yacht off the south-west coast of Cornwall and escorted the vessel into Newlyn harbour where it arrived on Thursday.
"Two men have been arrested for drug trafficking offences and are now being questioned by NCA officers, who are leading the investigation.
"Border Force and NCA officers, supported by Devon and Cornwall Police, remain at the scene."
The Newlyn harbourmaster later confirmed the harbour had been re-opened.