A knife attack in the UK's capital, London, has injured at least three people.

Iran PressEurope: A man is in hospital in a 'critical condition' after a stabbing on an East London bus, while two others were also taken to hospital with reportedly non life-threatening injuries.

British officials have not yet confirmed that the attack was a terrorist one. A police investigation has been launched.

In recent months, stabbings and cold weapons attacks have become the norm for terrorist groups in Europe.

European countries, including the United Kingdom, which has spared no effort to help terrorists in the Middle East, especially those based in Syria, are now facing the return of European members of ISIS terrorists and are facing such terrorist attacks. 219