A 25-year-old man has been arrested after three people were stabbed as members of the public tried to intervene in a phone robbery in central London. The suspect was arrested by detectives investigating a number of serious offences connected with the attempted robbery and knife attack in Bishopsgate last Thursday, said temporary DCI Colin Bishop, of City of London police’s major crime team. The man remains in custody after being arrested in Islington, north London, on Monday morning on suspicion of conspiracy to commit robbery, grievous bodily harm with intent and possession of an offensive weapon. Witnesses reported seeing a group of two or three masked men brandishing knives attacking a pedestrian just before 10am in Bishopsgate, near Liverpool Street train station. Members of the public, who were described as “heroes” by one witness, attempted to stop the attackers. Officers were alerted at 9.46am on Thursday to reports of three stabbings, which left the victims needing hospital treatment. The people who were attacked did not suffer life-threatening injuries. Detectives are appealing for witnesses to come forward. A London ambulance service spokesperson said three ambulance crews, two advanced paramedics, two incident response officers, a clinical team manager and members of its tactical response unit were sent to the scene.