A man armed with a knife attacked passengers at the station Leytonstone London underground.
As the news service, the BBC, the attack resulted in one man seriously injured and two others received minor injuries. The assailant was detained arrived on the scene by the police.
Police have launched an investigation into the incident, which, according to the preliminary version, is a terrorist attack.
«We see this as a manifestation of terrorism. We ask all to remain calm, but be vigilant», – said the head of antiterrorist division of police of London, Richard Walton.
Details about the identity of the detainee are not reported.