Officers arrested a 40-year-old man on suspicion of possession with intent to supply a Class B drug over an hour later, at 4:15pm.
British Transport Police confirmed the evacuation on Twitter, writing: “Some platforms at #KingsCross are closed as we respond to a security alert”.
Armed police stormed King’s Cross station in London on Thursday evening to detain a man that reportedly caused a security threat.
A number of people Twitter said they had been evacuated from the station on Thursday afternoon. Enquires are ongoing.
“A man has been detained by officers on the platforms and enquiries are ongoing”. Others said platforms 1-8 were closed, with staff removed from all trains. Platforms have since re-opened, BTP tweeted, thanking passengers for their co-operation.
The suspect was detained “following an incident on the train”, which arrived at 3.58 p.m. local time (10.58 p.m. ET), said a spokesman for station operator, Network Rail. Armed police taken control of the station’.
“Please follow instructions from station staff and officers”. Multiple platforms are closed while BTP continue their investigation, a spokesperson told City AM.
He added that platforms were closed as officers conducted a search.
National Rail tweeted that emergency services were dealing with “an incident”, delaying journeys by up to 15 minutes to and from the station.