Evidence suggests the Russian secret services appear to have ordered the blowing up of a railway line in Poland.

"Everything indicates" that the rail incident was "initiated by the Russian secret services", Jacek Dobrzynski, the spokesman for Poland's security services minister, said on Tuesday, according to the Polish Press Agency, or PAP.

In what Prime Minister Donald Tusk called an "unprecedented act of sabotage", a segment of a rail line linking Poland's capital, Warsaw, to the border with Ukraine was blown up at the weekend.

Another segment further south was also damaged in what officials say was likely sabotage as well.

That rail line is being used to transport aid to Ukraine, Polish officials said.

Dobrzynski was speaking to the media after a meeting of the governmental Nationa

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