LONDON: British police said on Friday they had arrested a teenager on suspicion of terrorism offences following the discovery of a ‘suspicious item’ on an underground train. Officers used a stun gun during the arrest of the 19-year-old. Police said they were not looking for anyone else at this stage. The suspect item – which is still being examined – was found on a train at North Greenwich station, near the Canary Wharf financial district and close to the O2 music venue, on Thursday morning. The bomb squad carried out a controlled explosion to make the item safe and the station and the Jubilee underground rail line were closed for hours while the police carried out their inquiries.