The head of state said this during a speech at the congress of railway workers.
"The enemy is trying to reach the most important infrastructure facilities of the Eastern Polygon," Putin stressed.
The Russian leader called on those who work in this area to be especially attentive.
Earlier, the FSB uncovered a terrorist attack on the Baikal-Amur Mainline, the perpetrator was detained, the curator was identified.
The Central District Court of Omsk sent into custody the Belarusian Sergei Yeremeev, accused of blowing up two trains on the Baikal-Amur Mainline in Buryatia.