Two Ukrainian men believed to be working with Russia identified as suspects in Polish rail sabotage attacks – as it happened

Donald Tusk warns Polish parliament of an escalation' of Russian intelligence activities across the whole of Europe'. This live blog is closed

Poland's prime minister Donald Tusk has just told lawmakers that the authorities investigating the rail sabotage incidents over the weekend identified two main suspects.

He says the suspects are Ukrainian men, who crossed into Poland from Belarus this autumn, and are believed to have been working for Russian intelligence services.