Polish officials have pointed the finger at Russia after a key train track was destroyed in what Warsaw said was an “unprecedented act of sabotage” committed by two Ukrainian citizens who were “collaborating with Russian services.

Evidence suggests the Russian secret services appears to have ordered the blowing up of a railway line in Poland over the weekend, a government spokesman said on Tuesday.

"Russia is accused of all manifestations of the hybrid and direct war that is taking place," Kremlin spokesman Dmitry Peskov told a Russian state television reporter.