Keith Palmer

A man was Tasered by police outside Parliament after he reached for a knife when approached by officers.

Scotland Yard said a man, in his 30s, was arrested on suspicion of possession of a knife.

There are no reported injuries and the incident on Friday morning is not thought to be terror related.

Five days before the first round of France’s presidential election, two men have been arrested on suspicion of planning an imminent attack.

The suspects, aged 23 and 29, were detained in Marseille by elite police and domestic intelligence agents after a search that had lasted several days.

Both men are French citizens said to have been radicalised in prison.

Italian police and the Carabinieri on Wednesday night arrested suspected Islamist militants from Kosovo - with valid residence permits in Italy - following 12 raids - 10 of which were in Venice's historic centre, one in Mestre, the mainland suburb of Venice, and one in Treviso.

Five people have died and at least 40 were injured after an attacker drove a car along a pavement in Westminster, stabbed a policeman and was shot dead by police in the grounds of Parliament.

The dead officer has been named as PC Keith Palmer, 48, a husband and father.